225121790 has 16 divisors (see below), whose sum is σ = 405563760. Its totient is φ = 89972160.

The previous prime is 225121789. The next prime is 225121811. The reversal of 225121790 is 97121522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (25347735).

Almost surely, 2^225121790 is an apocalyptic number.

225121790 is a deficient number, since it is larger than the sum of its proper divisors (180441970).

225121790 is a wasteful number, since it uses less digits than its factorization.

225121790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19147.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 225121790 is about 15004.0591174522. The cubic root of 225121790 is about 608.3299207081.

The spelling of 225121790 in words is "two hundred twenty-five million, one hundred twenty-one thousand, seven hundred ninety".