228677531 has 4 divisors (see below), whose sum is σ = 230775600. Its totient is φ = 226579464.

The previous prime is 228677509. The next prime is 228677543. The reversal of 228677531 is 135776822.

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

It is a cyclic number.

It is not a de Polignac number, because 228677531 - 2²² = 224483227 is a prime.

It is a super-2 number, since 2×228677531² = 104586826368511922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228677551) 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, 1048871 + ... + 1049088.

It is an arithmetic number, because the mean of its divisors is an integer number (57693900).

Almost surely, 2^228677531 is an apocalyptic number.

228677531 is a deficient number, since it is larger than the sum of its proper divisors (2098069).

228677531 is a wasteful number, since it uses less digits than its factorization.

228677531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098068.

The product of its digits is 141120, while the sum is 41.

The square root of 228677531 is about 15122.0875212386. The cubic root of 228677531 is about 611.5160097226.

The spelling of 228677531 in words is "two hundred twenty-eight million, six hundred seventy-seven thousand, five hundred thirty-one".