31148125 has 40 divisors (see below), whose sum is σ = 42611360. Its totient is φ = 22680000.

The previous prime is 31148123. The next prime is 31148137. The reversal of 31148125 is 52184113.

It is not a de Polignac number, because 31148125 - 2¹ = 31148123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 31148125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31148123) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 510595 + ... + 510655.

It is an arithmetic number, because the mean of its divisors is an integer number (1065284).

Almost surely, 2^31148125 is an apocalyptic number.

It is an amenable number.

31148125 is a deficient number, since it is larger than the sum of its proper divisors (11463235).

31148125 is an equidigital number, since it uses as much as digits as its factorization.

31148125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 128 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 31148125 is about 5581.0505283504. The cubic root of 31148125 is about 314.6376113040.

The spelling of 31148125 in words is "thirty-one million, one hundred forty-eight thousand, one hundred twenty-five".