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31003000131 = 3195009108587
BaseRepresentation
bin11100110111111011…
…000011110101000011
32222000122121120220010
4130313323003311003
51001443232001011
622124221520003
72145166103325
oct346773036503
988018546803
1031003000131
111216a426964
126012a13003
132c011129bc
141701737615
15c16bee1a6
hex737ec3d43

31003000131 has 16 divisors (see below), whose sum is σ = 43522070400. Its totient is φ = 19576752768.

The previous prime is 31003000117. The next prime is 31003000163. The reversal of 31003000131 is 13100030013.

It is not a de Polignac number, because 31003000131 - 29 = 31002999619 is a prime.

It is a super-2 number, since 2×310030001312 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31003000331) 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, 231220 + ... + 339806.

It is an arithmetic number, because the mean of its divisors is an integer number (2720129400).

Almost surely, 231003000131 is an apocalyptic number.

31003000131 is a deficient number, since it is larger than the sum of its proper divisors (12519070269).

31003000131 is a wasteful number, since it uses less digits than its factorization.

31003000131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113618.

The product of its (nonzero) digits is 27, while the sum is 12.

Adding to 31003000131 its reverse (13100030013), we get a palindrome (44103030144).

The spelling of 31003000131 in words is "thirty-one billion, three million, one hundred thirty-one", and thus it is an aban number.

Divisors: 1 3 19 57 5009 15027 95171 108587 285513 325761 2063153 6189459 543912283 1631736849 10334333377 31003000131