225521855 has 8 divisors (see below), whose sum is σ = 291443712. Its totient is φ = 166539168.

The previous prime is 225521833. The next prime is 225521861. The reversal of 225521855 is 558125522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225521855 - 2¹² = 225517759 is a prime.

It is a Duffinian number.

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, 1734719 + ... + 1734848.

It is an arithmetic number, because the mean of its divisors is an integer number (36430464).

Almost surely, 2^225521855 is an apocalyptic number.

225521855 is a deficient number, since it is larger than the sum of its proper divisors (65921857).

225521855 is a wasteful number, since it uses less digits than its factorization.

225521855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469585.

The product of its digits is 40000, while the sum is 35.

The square root of 225521855 is about 15017.3850919526. The cubic root of 225521855 is about 608.6900627840.

The spelling of 225521855 in words is "two hundred twenty-five million, five hundred twenty-one thousand, eight hundred fifty-five".