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23131230302 = 2171591942737
BaseRepresentation
bin10101100010101110…
…101001000001011110
32012201001111020201102
4111202232221001132
5334333043332202
614343142313102
71446133133135
oct254256510136
965631436642
1023131230302
11989aa81764
124596728792
13224831892b
1411960cc91c
15905ad2d02
hex562ba905e

23131230302 has 16 divisors (see below), whose sum is σ = 36741003840. Its totient is φ = 10884346368.

The previous prime is 23131230233. The next prime is 23131230307. The reversal of 23131230302 is 20303213132.

It is a super-2 number, since 2×231312303022 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131230307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519878 + ... + 562614.

It is an arithmetic number, because the mean of its divisors is an integer number (2296312740).

Almost surely, 223131230302 is an apocalyptic number.

23131230302 is a deficient number, since it is larger than the sum of its proper divisors (13609773538).

23131230302 is a wasteful number, since it uses less digits than its factorization.

23131230302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58675.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23131230302 its reverse (20303213132), we get a palindrome (43434443434).

The spelling of 23131230302 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty thousand, three hundred two".

Divisors: 1 2 17 34 15919 31838 42737 85474 270623 541246 726529 1453058 680330303 1360660606 11565615151 23131230302