225308631 has 16 divisors (see below), whose sum is σ = 320682240. Its totient is φ = 140293440.

The previous prime is 225308617. The next prime is 225308639. The reversal of 225308631 is 136803522.

It is not a de Polignac number, because 225308631 - 2¹⁷ = 225177559 is a prime.

It is a super-2 number, since 2×225308631² = 101527958406188322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225308639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23790 + ... + 31883.

It is an arithmetic number, because the mean of its divisors is an integer number (20042640).

Almost surely, 2^225308631 is an apocalyptic number.

225308631 is a deficient number, since it is larger than the sum of its proper divisors (95373609).

225308631 is a wasteful number, since it uses less digits than its factorization.

225308631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55766.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 225308631 is about 15010.2841745251. The cubic root of 225308631 is about 608.4981696971.

The spelling of 225308631 in words is "two hundred twenty-five million, three hundred eight thousand, six hundred thirty-one".