225555588 has 36 divisors (see below), whose sum is σ = 571023180. Its totient is φ = 75070656.

The previous prime is 225555587. The next prime is 225555607. The reversal of 225555588 is 885555522.

It can be written as a sum of positive squares in 2 ways, for example, as 151733124 + 73822464 = 12318^2 + 8592^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (225555581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21106 + ... + 29942.

It is an arithmetic number, because the mean of its divisors is an integer number (15861755).

Almost surely, 2^225555588 is an apocalyptic number.

It is an amenable number.

225555588 is an abundant number, since it is smaller than the sum of its proper divisors (345467592).

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

225555588 is a wasteful number, since it uses less digits than its factorization.

225555588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9556 (or 9551 counting only the distinct ones).

The product of its digits is 800000, while the sum is 45.

The square root of 225555588 is about 15018.5081815738. The cubic root of 225555588 is about 608.7204100545.

The spelling of 225555588 in words is "two hundred twenty-five million, five hundred fifty-five thousand, five hundred eighty-eight".