631525 has 6 divisors (see below), whose sum is σ = 783122. Its totient is φ = 505200.

The previous prime is 631513. The next prime is 631529. The reversal of 631525 is 525136.

It is a happy number.

631525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1089 + 630436 = 33^2 + 794^2 .

It is not a de Polignac number, because 631525 - 2⁹ = 631013 is a prime.

It is a Duffinian number.

631525 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 631496 and 631505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12606 + ... + 12655.

2⁶³¹⁵²⁵ is an apocalyptic number.

It is an amenable number.

631525 is a deficient number, since it is larger than the sum of its proper divisors (151597).

631525 is a wasteful number, since it uses less digits than its factorization.

631525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25271 (or 25266 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 631525 is about 794.6854723726. The cubic root of 631525 is about 85.7953036879.

It can be divided in two parts, 631 and 525, that added together give a square (1156 = 34²).

The spelling of 631525 in words is "six hundred thirty-one thousand, five hundred twenty-five".