31874651972 has 12 divisors (see below), whose sum is σ = 55782022380. Its totient is φ = 15936931296.

The previous prime is 31874651971. The next prime is 31874651981. The reversal of 31874651972 is 27915647813.

It can be written as a sum of positive squares in 2 ways, for example, as 23995249216 + 7879402756 = 154904^2 + 88766^2 .

It is a super-3 number, since 3×31874651972³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (31874651971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156158 + ... + 296874.

It is an arithmetic number, because the mean of its divisors is an integer number (4648501865).

Almost surely, 2^31874651972 is an apocalyptic number.

It is an amenable number.

31874651972 is a deficient number, since it is larger than the sum of its proper divisors (23907370408).

31874651972 is a wasteful number, since it uses less digits than its factorization.

31874651972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197350 (or 197348 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The spelling of 31874651972 in words is "thirty-one billion, eight hundred seventy-four million, six hundred fifty-one thousand, nine hundred seventy-two".