31013325 has 108 divisors (see below), whose sum is σ = 67534740. Its totient is φ = 13547520.

The previous prime is 31013293. The next prime is 31013341. The reversal of 31013325 is 52331013.

It can be written as a sum of positive squares in 6 ways, for example, as 741321 + 30272004 = 861^2 + 5502^2 .

It is not a de Polignac number, because 31013325 - 2⁵ = 31013293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31013298 and 31013307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 319677 + ... + 319773.

Almost surely, 2^31013325 is an apocalyptic number.

31013325 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31013325 is an abundant number, since it is smaller than the sum of its proper divisors (36521415).

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

31013325 is a wasteful number, since it uses less digits than its factorization.

31013325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 31013325 is about 5568.9608545940. The cubic root of 31013325 is about 314.1830683586.

Adding to 31013325 its reverse (52331013), we get a palindrome (83344338).

The spelling of 31013325 in words is "thirty-one million, thirteen thousand, three hundred twenty-five".