225581555 has 8 divisors (see below), whose sum is σ = 274510944. Its totient is φ = 177923200.

The previous prime is 225581537. The next prime is 225581593. The reversal of 225581555 is 555185522.

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

It is not a de Polignac number, because 225581555 - 2⁶ = 225581491 is a prime.

It is a Duffinian 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, 317366 + ... + 318075.

It is an arithmetic number, because the mean of its divisors is an integer number (34313868).

Almost surely, 2^225581555 is an apocalyptic number.

225581555 is a deficient number, since it is larger than the sum of its proper divisors (48929389).

225581555 is an equidigital number, since it uses as much as digits as its factorization.

225581555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635517.

The product of its digits is 100000, while the sum is 38.

The square root of 225581555 is about 15019.3726566724. The cubic root of 225581555 is about 608.7437687256.

The spelling of 225581555 in words is "two hundred twenty-five million, five hundred eighty-one thousand, five hundred fifty-five".