31125107 has 4 divisors (see below), whose sum is σ = 33519360. Its totient is φ = 28730856.

The previous prime is 31125071. The next prime is 31125119. The reversal of 31125107 is 70152113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31125107 - 2⁸ = 31124851 is a prime.

It is a super-2 number, since 2×31125107² = 1937544571522898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31125007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197107 + ... + 1197132.

It is an arithmetic number, because the mean of its divisors is an integer number (8379840).

Almost surely, 2^31125107 is an apocalyptic number.

31125107 is a deficient number, since it is larger than the sum of its proper divisors (2394253).

31125107 is a wasteful number, since it uses less digits than its factorization.

31125107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394252.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 31125107 is about 5578.9879906664. The cubic root of 31125107 is about 314.5600880367.

The spelling of 31125107 in words is "thirty-one million, one hundred twenty-five thousand, one hundred seven".