31253125 has 24 divisors (see below), whose sum is σ = 39888072. Its totient is φ = 24480000.

The previous prime is 31253083. The next prime is 31253141. The reversal of 31253125 is 52135213.

It can be written as a sum of positive squares in 12 ways, for example, as 30835809 + 417316 = 5553^2 + 646^2 .

It is not a de Polignac number, because 31253125 - 2¹³ = 31244933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31253096 and 31253105.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 228057 + ... + 228193.

It is an arithmetic number, because the mean of its divisors is an integer number (1662003).

Almost surely, 2^31253125 is an apocalyptic number.

It is an amenable number.

31253125 is a deficient number, since it is larger than the sum of its proper divisors (8634947).

31253125 is an frugal number, since it uses more digits than its factorization.

31253125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 215 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 31253125 is about 5590.4494452593. The cubic root of 31253125 is about 314.9907614658.

Adding to 31253125 its reverse (52135213), we get a palindrome (83388338).

The spelling of 31253125 in words is "thirty-one million, two hundred fifty-three thousand, one hundred twenty-five".