31585141172 has 24 divisors (see below), whose sum is σ = 59719768416. Its totient is φ = 14530265568.

The previous prime is 31585141163. The next prime is 31585141193. The reversal of 31585141172 is 27114158513.

It is a super-2 number, since 2×31585141172² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973298 + ... + 1005225.

It is an arithmetic number, because the mean of its divisors is an integer number (2488323684).

Almost surely, 2^31585141172 is an apocalyptic number.

It is an amenable number.

31585141172 is a deficient number, since it is larger than the sum of its proper divisors (28134627244).

31585141172 is a wasteful number, since it uses less digits than its factorization.

31585141172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978847 (or 1978845 counting only the distinct ones).

The product of its digits is 33600, while the sum is 38.

Adding to 31585141172 its reverse (27114158513), we get a palindrome (58699299685).

The spelling of 31585141172 in words is "thirty-one billion, five hundred eighty-five million, one hundred forty-one thousand, one hundred seventy-two".