225523290 has 16 divisors (see below), whose sum is σ = 541255968. Its totient is φ = 60139536.

The previous prime is 225523279. The next prime is 225523297. The reversal of 225523290 is 92325522.

225523290 = 6714² + 6715² + ... + 6718².

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7517443 = 225523290 / (2 + 2 + 5 + 5 + 2 + 3 + 2 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (225523297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3758692 + ... + 3758751.

It is an arithmetic number, because the mean of its divisors is an integer number (33828498).

Almost surely, 2^225523290 is an apocalyptic number.

225523290 is an abundant number, since it is smaller than the sum of its proper divisors (315732678).

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

225523290 is a wasteful number, since it uses less digits than its factorization.

225523290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7517453.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 225523290 is about 15017.4328698350. The cubic root of 225523290 is about 608.6913538169.

The spelling of 225523290 in words is "two hundred twenty-five million, five hundred twenty-three thousand, two hundred ninety".