225632731 has 6 divisors (see below), whose sum is σ = 233682332. Its totient is φ = 217851480.

The previous prime is 225632699. The next prime is 225632741. The reversal of 225632731 is 137236522.

It is not a de Polignac number, because 225632731 - 2⁵ = 225632699 is a prime.

It is a super-2 number, since 2×225632731² = 101820258597036722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225632693 and 225632702.

It is not an unprimeable number, because it can be changed into a prime (225632741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133305 + ... + 134986.

Almost surely, 2^225632731 is an apocalyptic number.

225632731 is a deficient number, since it is larger than the sum of its proper divisors (8049601).

225632731 is an equidigital number, since it uses as much as digits as its factorization.

225632731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268349 (or 268320 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 225632731 is about 15021.0762264227. The cubic root of 225632731 is about 608.7897989600.

The spelling of 225632731 in words is "two hundred twenty-five million, six hundred thirty-two thousand, seven hundred thirty-one".