31215253325 has 6 divisors (see below), whose sum is σ = 38706914154. Its totient is φ = 24972202640.

The previous prime is 31215253319. The next prime is 31215253327. The reversal of 31215253325 is 52335251213.

It can be written as a sum of positive squares in 3 ways, for example, as 137641 + 31215115684 = 371^2 + 176678^2 .

It is not a de Polignac number, because 31215253325 - 2¹² = 31215249229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31215253291 and 31215253300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31215253327) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 624305042 + ... + 624305091.

It is an arithmetic number, because the mean of its divisors is an integer number (6451152359).

Almost surely, 2^31215253325 is an apocalyptic number.

It is an amenable number.

31215253325 is a deficient number, since it is larger than the sum of its proper divisors (7491660829).

31215253325 is a wasteful number, since it uses less digits than its factorization.

31215253325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248610143 (or 1248610138 counting only the distinct ones).

The product of its digits is 27000, while the sum is 32.

The spelling of 31215253325 in words is "thirty-one billion, two hundred fifteen million, two hundred fifty-three thousand, three hundred twenty-five".