225186631 has 4 divisors (see below), whose sum is σ = 225239832. Its totient is φ = 225133432.

The previous prime is 225186589. The next prime is 225186659. The reversal of 225186631 is 136681522.

225186631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136681522 = 2 ⋅68340761.

It is a cyclic number.

It is not a de Polignac number, because 225186631 - 2⁷ = 225186503 is a prime.

It is a super-2 number, since 2×225186631² = 101418037562260322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225186331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19645 + ... + 28918.

It is an arithmetic number, because the mean of its divisors is an integer number (56309958).

Almost surely, 2^225186631 is an apocalyptic number.

225186631 is a deficient number, since it is larger than the sum of its proper divisors (53201).

225186631 is an equidigital number, since it uses as much as digits as its factorization.

225186631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53200.

The product of its digits is 17280, while the sum is 34.

The square root of 225186631 is about 15006.2197438262. The cubic root of 225186631 is about 608.3883201104.

The spelling of 225186631 in words is "two hundred twenty-five million, one hundred eighty-six thousand, six hundred thirty-one".