31345697142 has 32 divisors (see below), whose sum is σ = 70696771200. Its totient is φ = 10292615784.

The previous prime is 31345697081. The next prime is 31345697191. The reversal of 31345697142 is 24179654313.

31345697142 is a `hidden beast` number, since 3 + 13 + 4 + 569 + 71 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4328292 + ... + 4335527.

It is an arithmetic number, because the mean of its divisors is an integer number (2209274100).

Almost surely, 2^31345697142 is an apocalyptic number.

31345697142 is an abundant number, since it is smaller than the sum of its proper divisors (39351074058).

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

31345697142 is a wasteful number, since it uses less digits than its factorization.

31345697142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8663897 (or 8663891 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 31345697142 in words is "thirty-one billion, three hundred forty-five million, six hundred ninety-seven thousand, one hundred forty-two".