31987152142 has 16 divisors (see below), whose sum is σ = 52605648000. Its totient is φ = 14466549240.

The previous prime is 31987152133. The next prime is 31987152143. The reversal of 31987152142 is 24125178913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31987152143) 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, 3648792 + ... + 3657547.

It is an arithmetic number, because the mean of its divisors is an integer number (3287853000).

Almost surely, 2^31987152142 is an apocalyptic number.

31987152142 is a deficient number, since it is larger than the sum of its proper divisors (20618495858).

31987152142 is a wasteful number, since it uses less digits than its factorization.

31987152142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306551.

The product of its digits is 120960, while the sum is 43.

The spelling of 31987152142 in words is "thirty-one billion, nine hundred eighty-seven million, one hundred fifty-two thousand, one hundred forty-two".