31564473125 has 20 divisors (see below), whose sum is σ = 39560271036. Its totient is φ = 25176480000.

The previous prime is 31564473097. The next prime is 31564473169. The reversal of 31564473125 is 52137446513.

It can be written as a sum of positive squares in 10 ways, for example, as 29636999716 + 1927473409 = 172154^2 + 43903^2 .

It is not a de Polignac number, because 31564473125 - 2⁸ = 31564472869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 135695 + ... + 285555.

Almost surely, 2^31564473125 is an apocalyptic number.

It is an amenable number.

31564473125 is a deficient number, since it is larger than the sum of its proper divisors (7995797911).

31564473125 is an equidigital number, since it uses as much as digits as its factorization.

31564473125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150218 (or 150203 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The spelling of 31564473125 in words is "thirty-one billion, five hundred sixty-four million, four hundred seventy-three thousand, one hundred twenty-five".