225612531 has 12 divisors (see below), whose sum is σ = 326015040. Its totient is φ = 150348240.

The previous prime is 225612521. The next prime is 225612551. The reversal of 225612531 is 135216522.

It is a happy number.

It is not a de Polignac number, because 225612531 - 2⁹ = 225612019 is a prime.

It is a super-2 number, since 2×225612531² = 101802028288451922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225612495 and 225612504.

It is not an unprimeable number, because it can be changed into a prime (225612521) 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, 40885 + ... + 46073.

It is an arithmetic number, because the mean of its divisors is an integer number (27167920).

Almost surely, 2^225612531 is an apocalyptic number.

225612531 is a deficient number, since it is larger than the sum of its proper divisors (100402509).

225612531 is a wasteful number, since it uses less digits than its factorization.

225612531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10026 (or 10023 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 225612531 is about 15020.4038228005. The cubic root of 225612531 is about 608.7716309089.

The spelling of 225612531 in words is "two hundred twenty-five million, six hundred twelve thousand, five hundred thirty-one".