31313125 has 10 divisors (see below), whose sum is σ = 39129662. Its totient is φ = 25050000.

The previous prime is 31313123. The next prime is 31313141. The reversal of 31313125 is 52131313.

It can be written as a sum of positive squares in 5 ways, for example, as 18653761 + 12659364 = 4319^2 + 3558^2 .

It is not a de Polignac number, because 31313125 - 2¹ = 31313123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24426 + ... + 25675.

Almost surely, 2^31313125 is an apocalyptic number.

It is an amenable number.

31313125 is a deficient number, since it is larger than the sum of its proper divisors (7816537).

31313125 is an frugal number, since it uses more digits than its factorization.

31313125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50121 (or 50106 counting only the distinct ones).

The product of its digits is 270, while the sum is 19.

The square root of 31313125 is about 5595.8131670026. The cubic root of 31313125 is about 315.1922065388.

Adding to 31313125 its reverse (52131313), we get a palindrome (83444438).

The spelling of 31313125 in words is "thirty-one million, three hundred thirteen thousand, one hundred twenty-five".