225994555 has 4 divisors (see below), whose sum is σ = 271193472. Its totient is φ = 180795640.

The previous prime is 225994547. The next prime is 225994579. The reversal of 225994555 is 555499522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225994555 - 2³ = 225994547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22599451 + ... + 22599460.

It is an arithmetic number, because the mean of its divisors is an integer number (67798368).

Almost surely, 2^225994555 is an apocalyptic number.

225994555 is a deficient number, since it is larger than the sum of its proper divisors (45198917).

225994555 is an equidigital number, since it uses as much as digits as its factorization.

225994555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45198916.

The product of its digits is 810000, while the sum is 46.

The square root of 225994555 is about 15033.1152792759. The cubic root of 225994555 is about 609.1150430267.

The spelling of 225994555 in words is "two hundred twenty-five million, nine hundred ninety-four thousand, five hundred fifty-five".