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23045715 = 345711739
BaseRepresentation
bin101011111101…
…0011001010011
31121100211210000
41113322121103
521344430330
62141541043
7366612450
oct127723123
947324700
1023045715
1112010650
127874783
134a0b824
1430bc827
152053560
hex15fa653

23045715 has 80 divisors (see below), whose sum is σ = 51575040. Its totient is φ = 9564480.

The previous prime is 23045683. The next prime is 23045717. The reversal of 23045715 is 51754032.

It is a happy number.

It is not a de Polignac number, because 23045715 - 25 = 23045683 is a prime.

It is a super-2 number, since 2×230457152 = 1062209959722450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23045717) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 30816 + ... + 31554.

It is an arithmetic number, because the mean of its divisors is an integer number (644688).

Almost surely, 223045715 is an apocalyptic number.

23045715 is an abundant number, since it is smaller than the sum of its proper divisors (28529325).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23045715 is a wasteful number, since it uses less digits than its factorization.

23045715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 23045715 is about 4800.5952755882. The cubic root of 23045715 is about 284.5749897813.

Adding to 23045715 its reverse (51754032), we get a palindrome (74799747).

The spelling of 23045715 in words is "twenty-three million, forty-five thousand, seven hundred fifteen".

Divisors: 1 3 5 7 9 11 15 21 27 33 35 45 55 63 77 81 99 105 135 165 189 231 297 315 385 405 495 567 693 739 891 945 1155 1485 2079 2217 2835 3465 3695 4455 5173 6237 6651 8129 10395 11085 15519 19953 24387 25865 31185 33255 40645 46557 56903 59859 73161 77595 99765 121935 139671 170709 219483 232785 284515 299295 365805 419013 512127 658449 698355 853545 1097415 1536381 2095065 2560635 3292245 4609143 7681905 23045715