31994197146 has 12 divisors (see below), whose sum is σ = 69320760522. Its totient is φ = 10664732376.

The previous prime is 31994197139. The next prime is 31994197159. The reversal of 31994197146 is 64179149913.

31994197146 is a `hidden beast` number, since 31 + 99 + 419 + 71 + 46 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18489200625 + 13504996521 = 135975^2 + 116211^2 .

It is a super-2 number, since 2×31994197146² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31994197092 and 31994197101.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 888727681 + ... + 888727716.

Almost surely, 2^31994197146 is an apocalyptic number.

31994197146 is an abundant number, since it is smaller than the sum of its proper divisors (37326563376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31994197146 is a wasteful number, since it uses less digits than its factorization.

31994197146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777455405 (or 1777455402 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The spelling of 31994197146 in words is "thirty-one billion, nine hundred ninety-four million, one hundred ninety-seven thousand, one hundred forty-six".