31251125 has 32 divisors (see below), whose sum is σ = 41614560. Its totient is φ = 23385600.

The previous prime is 31251119. The next prime is 31251161. The reversal of 31251125 is 52115213.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 19704721 + 11546404 = 4439^2 + 3398^2 .

It is not a de Polignac number, because 31251125 - 2⁴ = 31251109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31251097 and 31251106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134009 + ... + 134241.

It is an arithmetic number, because the mean of its divisors is an integer number (1300455).

Almost surely, 2^31251125 is an apocalyptic number.

It is an amenable number.

31251125 is a deficient number, since it is larger than the sum of its proper divisors (10363435).

31251125 is a wasteful number, since it uses less digits than its factorization.

31251125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 304 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 31251125 is about 5590.2705659029. The cubic root of 31251125 is about 314.9840421915.

Adding to 31251125 its reverse (52115213), we get a palindrome (83366338).

It can be divided in two parts, 3125 and 1125, that multiplied together give a square (3515625 = 1875²).

The spelling of 31251125 in words is "thirty-one million, two hundred fifty-one thousand, one hundred twenty-five".