31606145312 has 48 divisors (see below), whose sum is σ = 71132060160. Its totient is φ = 13542018048.

The previous prime is 31606145297. The next prime is 31606145317. The reversal of 31606145312 is 21354160613.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (31606145317) 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, 980264 + ... + 1011992.

It is an arithmetic number, because the mean of its divisors is an integer number (1481917920).

Almost surely, 2^31606145312 is an apocalyptic number.

31606145312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31606145312 is an abundant number, since it is smaller than the sum of its proper divisors (39525914848).

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

31606145312 is a wasteful number, since it uses less digits than its factorization.

31606145312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36193 (or 36185 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 31606145312 in words is "thirty-one billion, six hundred six million, one hundred forty-five thousand, three hundred twelve".