31040325 has 18 divisors (see below), whose sum is σ = 55597074. Its totient is φ = 16554720.

The previous prime is 31040297. The next prime is 31040329. The reversal of 31040325 is 52304013.

It can be written as a sum of positive squares in 3 ways, for example, as 370881 + 30669444 = 609^2 + 5538^2 .

It is not a de Polignac number, because 31040325 - 2⁵ = 31040293 is a prime.

It is a super-2 number, since 2×31040325² = 1927003552211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31040298 and 31040307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68754 + ... + 69203.

Almost surely, 2^31040325 is an apocalyptic number.

It is an amenable number.

31040325 is a deficient number, since it is larger than the sum of its proper divisors (24556749).

31040325 is a wasteful number, since it uses less digits than its factorization.

31040325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137973 (or 137965 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 31040325 is about 5571.3844778475. The cubic root of 31040325 is about 314.2742171611.

Adding to 31040325 its reverse (52304013), we get a palindrome (83344338).

The spelling of 31040325 in words is "thirty-one million, forty thousand, three hundred twenty-five".