531625 has 8 divisors (see below), whose sum is σ = 663624. Its totient is φ = 425200.

The previous prime is 531623. The next prime is 531631. The reversal of 531625 is 526135.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 434281 = 312^2 + 659^2 .

It is not a de Polignac number, because 531625 - 2¹ = 531623 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 531596 and 531605.

It is not an unprimeable number, because it can be changed into a prime (531623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (82953).

2⁵³¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

531625 is a deficient number, since it is larger than the sum of its proper divisors (131999).

531625 is an equidigital number, since it uses as much as digits as its factorization.

531625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268 (or 4258 counting only the distinct ones).

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

The square root of 531625 is about 729.1261893527. The cubic root of 531625 is about 81.0093470898.

It can be divided in two parts, 531 and 625, that added together give a square (1156 = 34²).

The spelling of 531625 in words is "five hundred thirty-one thousand, six hundred twenty-five".