31443809316 has 12 divisors (see below), whose sum is σ = 73368888432. Its totient is φ = 10481269768.

The previous prime is 31443809233. The next prime is 31443809317. The reversal of 31443809316 is 61390834413.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31443809317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310158710 + ... + 1310158733.

It is an arithmetic number, because the mean of its divisors is an integer number (6114074036).

Almost surely, 2^31443809316 is an apocalyptic number.

It is an amenable number.

31443809316 is an abundant number, since it is smaller than the sum of its proper divisors (41925079116).

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

31443809316 is a wasteful number, since it uses less digits than its factorization.

31443809316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620317450 (or 2620317448 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 31443809316 in words is "thirty-one billion, four hundred forty-three million, eight hundred nine thousand, three hundred sixteen".