31854072131 has 8 divisors (see below), whose sum is σ = 36648981600. Its totient is φ = 27120244608.

The previous prime is 31854072127. The next prime is 31854072139. The reversal of 31854072131 is 13127045813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31854072131 - 2² = 31854072127 is a prime.

It is a super-2 number, since 2×31854072131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31854072091 and 31854072100.

It is not an unprimeable number, because it can be changed into a prime (31854072139) 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, 15269366 + ... + 15271451.

It is an arithmetic number, because the mean of its divisors is an integer number (4581122700).

Almost surely, 2^31854072131 is an apocalyptic number.

31854072131 is a deficient number, since it is larger than the sum of its proper divisors (4794909469).

31854072131 is a wasteful number, since it uses less digits than its factorization.

31854072131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30540973.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 31854072131 in words is "thirty-one billion, eight hundred fifty-four million, seventy-two thousand, one hundred thirty-one".