31542849387 has 16 divisors (see below), whose sum is σ = 53405882880. Its totient is φ = 18024485256.

The previous prime is 31542849379. The next prime is 31542849413. The reversal of 31542849387 is 78394824513.

It is a happy number.

31542849387 is a `hidden beast` number, since 3 + 1 + 54 + 28 + 493 + 87 = 666.

It is not a de Polignac number, because 31542849387 - 2³ = 31542849379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31542849187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83446503 + ... + 83446880.

It is an arithmetic number, because the mean of its divisors is an integer number (3337867680).

Almost surely, 2^31542849387 is an apocalyptic number.

31542849387 is a deficient number, since it is larger than the sum of its proper divisors (21863033493).

31542849387 is a wasteful number, since it uses less digits than its factorization.

31542849387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166893399 (or 166893393 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 31542849387 in words is "thirty-one billion, five hundred forty-two million, eight hundred forty-nine thousand, three hundred eighty-seven".