31385036216 has 32 divisors (see below), whose sum is σ = 62712023040. Its totient is φ = 14690863968.

The previous prime is 31385036161. The next prime is 31385036237. The reversal of 31385036216 is 61263058313.

It is a self number, because there is not a number n which added to its sum of digits gives 31385036216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805936 + ... + 1823231.

It is an arithmetic number, because the mean of its divisors is an integer number (1959750720).

Almost surely, 2^31385036216 is an apocalyptic number.

It is an amenable number.

31385036216 is a deficient number, since it is larger than the sum of its proper divisors (31326986824).

31385036216 is a wasteful number, since it uses less digits than its factorization.

31385036216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629243 (or 3629239 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 31385036216 in words is "thirty-one billion, three hundred eighty-five million, thirty-six thousand, two hundred sixteen".