31725523 has 4 divisors (see below), whose sum is σ = 31777560. Its totient is φ = 31673488.

The previous prime is 31725521. The next prime is 31725557. The reversal of 31725523 is 32552713.

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 31725523 - 2¹ = 31725521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31725491 and 31725500.

It is not an unprimeable number, because it can be changed into a prime (31725521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25093 + ... + 26326.

It is an arithmetic number, because the mean of its divisors is an integer number (7944390).

Almost surely, 2^31725523 is an apocalyptic number.

31725523 is a deficient number, since it is larger than the sum of its proper divisors (52037).

31725523 is an equidigital number, since it uses as much as digits as its factorization.

31725523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52036.

The product of its digits is 6300, while the sum is 28.

The square root of 31725523 is about 5632.5414334916. The cubic root of 31725523 is about 316.5698837504.

The spelling of 31725523 in words is "thirty-one million, seven hundred twenty-five thousand, five hundred twenty-three".