225727812 has 36 divisors (see below), whose sum is σ = 583863280. Its totient is φ = 73492272.

The previous prime is 225727741. The next prime is 225727813. The reversal of 225727812 is 218727522.

225727812 is a `hidden beast` number, since 2 + 2 + 572 + 7 + 81 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×225727812² = 101906090220614688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (225727813) 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 11 ways as a sum of consecutive naturals, for example, 71362 + ... + 74457.

Almost surely, 2^225727812 is an apocalyptic number.

It is an amenable number.

225727812 is an abundant number, since it is smaller than the sum of its proper divisors (358135468).

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

225727812 is a wasteful number, since it uses less digits than its factorization.

225727812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145872 (or 145867 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 225727812 is about 15024.2408127665. The cubic root of 225727812 is about 608.8753010556.

The spelling of 225727812 in words is "two hundred twenty-five million, seven hundred twenty-seven thousand, eight hundred twelve".