228317555 has 4 divisors (see below), whose sum is σ = 273981072. Its totient is φ = 182654040.

The previous prime is 228317477. The next prime is 228317567. The reversal of 228317555 is 555713822.

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

It is not a de Polignac number, because 228317555 - 2¹⁶ = 228252019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22831751 + ... + 22831760.

It is an arithmetic number, because the mean of its divisors is an integer number (68495268).

Almost surely, 2^228317555 is an apocalyptic number.

228317555 is a deficient number, since it is larger than the sum of its proper divisors (45663517).

228317555 is an equidigital number, since it uses as much as digits as its factorization.

228317555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45663516.

The product of its digits is 84000, while the sum is 38.

The square root of 228317555 is about 15110.1805085181. The cubic root of 228317555 is about 611.1949656527.

The spelling of 228317555 in words is "two hundred twenty-eight million, three hundred seventeen thousand, five hundred fifty-five".