31198125 has 40 divisors (see below), whose sum is σ = 59430976. Its totient is φ = 14256000.

The previous prime is 31198109. The next prime is 31198147. The reversal of 31198125 is 52189113.

It is not a de Polignac number, because 31198125 - 2⁴ = 31198109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31198092 and 31198101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11937 + ... + 14313.

Almost surely, 2^31198125 is an apocalyptic number.

31198125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31198125 is a deficient number, since it is larger than the sum of its proper divisors (28232851).

31198125 is an equidigital number, since it uses as much as digits as its factorization.

31198125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2392 counting only the distinct ones).

The product of its digits is 2160, while the sum is 30.

The square root of 31198125 is about 5585.5281755623. The cubic root of 31198125 is about 314.8058768662.

The spelling of 31198125 in words is "thirty-one million, one hundred ninety-eight thousand, one hundred twenty-five".