31331542836 has 48 divisors (see below), whose sum is σ = 79801364160. Its totient is φ = 9488651520.

The previous prime is 31331542829. The next prime is 31331542859. The reversal of 31331542836 is 63824513313.

It is a junction number, because it is equal to n+sod(n) for n = 31331542794 and 31331542803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149200 + ... + 291416.

It is an arithmetic number, because the mean of its divisors is an integer number (1662528420).

Almost surely, 2^31331542836 is an apocalyptic number.

It is an amenable number.

31331542836 is an abundant number, since it is smaller than the sum of its proper divisors (48469821324).

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

31331542836 is a wasteful number, since it uses less digits than its factorization.

31331542836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143904 (or 143902 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The spelling of 31331542836 in words is "thirty-one billion, three hundred thirty-one million, five hundred forty-two thousand, eight hundred thirty-six".