225123690 has 64 divisors (see below), whose sum is σ = 624101760. Its totient is φ = 51363840.

The previous prime is 225123683. The next prime is 225123697. The reversal of 225123690 is 96321522.

It is an interprime number because it is at equal distance from previous prime (225123683) and next prime (225123697).

It is a super-2 number, since 2×225123690² = 101361351598432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (225123697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14455 + ... + 25674.

It is an arithmetic number, because the mean of its divisors is an integer number (9751590).

Almost surely, 2^225123690 is an apocalyptic number.

225123690 is an abundant number, since it is smaller than the sum of its proper divisors (398978070).

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

225123690 is a wasteful number, since it uses less digits than its factorization.

225123690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40167.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 225123690 is about 15004.1224335181. The cubic root of 225123690 is about 608.3316321130.

The spelling of 225123690 in words is "two hundred twenty-five million, one hundred twenty-three thousand, six hundred ninety".