31601331131 has 8 divisors (see below), whose sum is σ = 32200220880. Its totient is φ = 31006927872.

The previous prime is 31601331119. The next prime is 31601331169. The reversal of 31601331131 is 13113310613.

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 31601331131 - 2³⁰ = 30527589307 is a prime.

It is a super-2 number, since 2×31601331131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31601331097 and 31601331106.

It is not an unprimeable number, because it can be changed into a prime (31601331731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107401 + ... + 1135578.

It is an arithmetic number, because the mean of its divisors is an integer number (4025027610).

Almost surely, 2^31601331131 is an apocalyptic number.

31601331131 is a deficient number, since it is larger than the sum of its proper divisors (598889749).

31601331131 is a wasteful number, since it uses less digits than its factorization.

31601331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243245.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31601331131 its reverse (13113310613), we get a palindrome (44714641744).

The spelling of 31601331131 in words is "thirty-one billion, six hundred one million, three hundred thirty-one thousand, one hundred thirty-one".