31248125 has 30 divisors (see below), whose sum is σ = 41719458. Its totient is φ = 23392000.

The previous prime is 31248121. The next prime is 31248127. The reversal of 31248125 is 52184213.

It can be written as a sum of positive squares in 15 ways, for example, as 19971961 + 11276164 = 4469^2 + 3358^2 .

It is not a de Polignac number, because 31248125 - 2² = 31248121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31248094 and 31248103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31248121) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 180539 + ... + 180711.

Almost surely, 2^31248125 is an apocalyptic number.

It is an amenable number.

31248125 is a deficient number, since it is larger than the sum of its proper divisors (10471333).

31248125 is an equidigital number, since it uses as much as digits as its factorization.

31248125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 195 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 31248125 is about 5590.0022361355. The cubic root of 31248125 is about 314.9739627425.

It can be divided in two parts, 312481 and 25, that multiplied together give a square (7812025 = 2795²).

The spelling of 31248125 in words is "thirty-one million, two hundred forty-eight thousand, one hundred twenty-five".