228555881 has 4 divisors (see below), whose sum is σ = 228767232. Its totient is φ = 228344532.

The previous prime is 228555841. The next prime is 228555917. The reversal of 228555881 is 188555822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228555881 - 2¹⁴ = 228539497 is a prime.

It is a super-2 number, since 2×228555881² = 104475581479372322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228555841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104045 + ... + 106218.

It is an arithmetic number, because the mean of its divisors is an integer number (57191808).

Almost surely, 2^228555881 is an apocalyptic number.

It is an amenable number.

228555881 is a deficient number, since it is larger than the sum of its proper divisors (211351).

228555881 is a wasteful number, since it uses less digits than its factorization.

228555881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211350.

The product of its digits is 256000, while the sum is 44.

The square root of 228555881 is about 15118.0647240313. The cubic root of 228555881 is about 611.4075540624.

The spelling of 228555881 in words is "two hundred twenty-eight million, five hundred fifty-five thousand, eight hundred eighty-one".