225661512 has 32 divisors (see below), whose sum is σ = 564933600. Its totient is φ = 75116544.

The previous prime is 225661511. The next prime is 225661529. The reversal of 225661512 is 215166522.

It is a super-2 number, since 2×225661512² = 101846235996252288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225661512.

It is not an unprimeable number, because it can be changed into a prime (225661511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12343 + ... + 24569.

It is an arithmetic number, because the mean of its divisors is an integer number (17654175).

Almost surely, 2^225661512 is an apocalyptic number.

It is an amenable number.

225661512 is an abundant number, since it is smaller than the sum of its proper divisors (339272088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225661512 is a wasteful number, since it uses less digits than its factorization.

225661512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13005 (or 13001 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 225661512 is about 15022.0342164435. The cubic root of 225661512 is about 608.8156829621.

The spelling of 225661512 in words is "two hundred twenty-five million, six hundred sixty-one thousand, five hundred twelve".