625231 has 2 divisors, whose sum is σ = 625232. Its totient is φ = 625230.

The previous prime is 625213. The next prime is 625237. The reversal of 625231 is 132526.

It is a happy number.

625231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (625213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625231 - 2⁵ = 625199 is a prime.

It is a super-2 number, since 2×625231² = 781827606722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 625199 and 625208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312615 + 312616.

It is an arithmetic number, because the mean of its divisors is an integer number (312616).

2⁶²⁵²³¹ is an apocalyptic number.

625231 is a deficient number, since it is larger than the sum of its proper divisors (1).

625231 is an equidigital number, since it uses as much as digits as its factorization.

625231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 19.

The square root of 625231 is about 790.7154987731. The cubic root of 625231 is about 85.5093294882.

Adding to 625231 its reverse (132526), we get a palindrome (757757).

The spelling of 625231 in words is "six hundred twenty-five thousand, two hundred thirty-one".