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23042901 = 378912329
BaseRepresentation
bin101011111100…
…1101101010101
31121100200220210
41113321231111
521344333101
62141520033
7366601320
oct127715525
947320823
1023042901
1112009522
127873019
134a0a46b
1430bb7b7
1520527d6
hex15f9b55

23042901 has 16 divisors (see below), whose sum is σ = 35510400. Its totient is φ = 13018368.

The previous prime is 23042891. The next prime is 23042909. The reversal of 23042901 is 10924032.

It is not a de Polignac number, because 23042901 - 25 = 23042869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23042909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4296 + ... + 8033.

It is an arithmetic number, because the mean of its divisors is an integer number (2219400).

Almost surely, 223042901 is an apocalyptic number.

23042901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23042901 is a deficient number, since it is larger than the sum of its proper divisors (12467499).

23042901 is a wasteful number, since it uses less digits than its factorization.

23042901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23042901 is about 4800.3021779884. The cubic root of 23042901 is about 284.5634066213.

Adding to 23042901 its reverse (10924032), we get a palindrome (33966933).

The spelling of 23042901 in words is "twenty-three million, forty-two thousand, nine hundred one".

Divisors: 1 3 7 21 89 267 623 1869 12329 36987 86303 258909 1097281 3291843 7680967 23042901