31382145 has 12 divisors (see below), whose sum is σ = 54395796. Its totient is φ = 16737120.

The previous prime is 31382123. The next prime is 31382171. The reversal of 31382145 is 54128313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3154176 + 28227969 = 1776^2 + 5313^2 .

It is not a de Polignac number, because 31382145 - 2¹⁰ = 31381121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348646 + ... + 348735.

It is an arithmetic number, because the mean of its divisors is an integer number (4532983).

Almost surely, 2^31382145 is an apocalyptic number.

It is an amenable number.

31382145 is a deficient number, since it is larger than the sum of its proper divisors (23013651).

31382145 is a wasteful number, since it uses less digits than its factorization.

31382145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697392 (or 697389 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 31382145 is about 5601.9768832083. The cubic root of 31382145 is about 315.4236175091.

The spelling of 31382145 in words is "thirty-one million, three hundred eighty-two thousand, one hundred forty-five".