31431535542 has 64 divisors (see below), whose sum is σ = 76235281920. Its totient is φ = 9520005600.

The previous prime is 31431535529. The next prime is 31431535567. The reversal of 31431535542 is 24553513413.

31431535542 is a `hidden beast` number, since 31 + 4 + 31 + 53 + 5 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31431535497 and 31431535506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1302567 + ... + 1326477.

It is an arithmetic number, because the mean of its divisors is an integer number (1191176280).

Almost surely, 2^31431535542 is an apocalyptic number.

31431535542 is an abundant number, since it is smaller than the sum of its proper divisors (44803746378).

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

31431535542 is a wasteful number, since it uses less digits than its factorization.

31431535542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26146 (or 26140 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 31431535542 in words is "thirty-one billion, four hundred thirty-one million, five hundred thirty-five thousand, five hundred forty-two".