631225 has 12 divisors (see below), whose sum is σ = 894784. Its totient is φ = 432720.

The previous prime is 631223. The next prime is 631229. The reversal of 631225 is 522136.

It is a happy number.

631225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631225 - 2¹ = 631223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1629 + ... + 1978.

2⁶³¹²²⁵ is an apocalyptic number.

It is an amenable number.

631225 is a deficient number, since it is larger than the sum of its proper divisors (263559).

631225 is a wasteful number, since it uses less digits than its factorization.

631225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624 (or 3619 counting only the distinct ones).

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

The square root of 631225 is about 794.4966960284. The cubic root of 631225 is about 85.7817161193.

The spelling of 631225 in words is "six hundred thirty-one thousand, two hundred twenty-five".