31245966320 has 40 divisors (see below), whose sum is σ = 72654933120. Its totient is φ = 12496999680.

The previous prime is 31245966293. The next prime is 31245966329. The reversal of 31245966320 is 2366954213.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×31245966320² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31245966329) 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, 1007201 + ... + 1037759.

It is an arithmetic number, because the mean of its divisors is an integer number (1816373328).

Almost surely, 2^31245966320 is an apocalyptic number.

It is an amenable number.

31245966320 is an abundant number, since it is smaller than the sum of its proper divisors (41408966800).

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

31245966320 is a wasteful number, since it uses less digits than its factorization.

31245966320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43353 (or 43347 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 31245966320 in words is "thirty-one billion, two hundred forty-five million, nine hundred sixty-six thousand, three hundred twenty".