228087432225 has 45 divisors (see below), whose sum is σ = 422536582633. Its totient is φ = 121635168480.

The previous prime is 228087432203. The next prime is 228087432239. The reversal of 228087432225 is 522234780822.

The square root of 228087432225 is 477585.

It is a perfect power (a square), and thus also a powerful number.

228087432225 is a `hidden beast` number, since 228 + 0 + 87 + 4 + 322 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 73713879009 + 154373553216 = 271503^2 + 392904^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 228087432225 - 2¹¹ = 228087430177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

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

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 21486019 + ... + 21496631.

Almost surely, 2^228087432225 is an apocalyptic number.

228087432225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

228087432225 is the 477585-th square number.

228087432225 is the 238793-rd centered octagonal number.

It is an amenable number.

228087432225 is a deficient number, since it is larger than the sum of its proper divisors (194449150408).

228087432225 is an frugal number, since it uses more digits than its factorization.

228087432225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21248 (or 10621 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 228087432225 in words is "two hundred twenty-eight billion, eighty-seven million, four hundred thirty-two thousand, two hundred twenty-five".