228631665 has 32 divisors (see below), whose sum is σ = 384777216. Its totient is φ = 115764480.

The previous prime is 228631643. The next prime is 228631687. The reversal of 228631665 is 566136822.

It is an interprime number because it is at equal distance from previous prime (228631643) and next prime (228631687).

It is not a de Polignac number, because 228631665 - 2⁹ = 228631153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20007 + ... + 29283.

It is an arithmetic number, because the mean of its divisors is an integer number (12024288).

Almost surely, 2^228631665 is an apocalyptic number.

It is an amenable number.

228631665 is a deficient number, since it is larger than the sum of its proper divisors (156145551).

228631665 is a wasteful number, since it uses less digits than its factorization.

228631665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9369.

The product of its digits is 103680, while the sum is 39.

The square root of 228631665 is about 15120.5709217609. The cubic root of 228631665 is about 611.4751229353.

The spelling of 228631665 in words is "two hundred twenty-eight million, six hundred thirty-one thousand, six hundred sixty-five".