228932881 has 4 divisors (see below), whose sum is σ = 240982000. Its totient is φ = 216883764.

The previous prime is 228932797. The next prime is 228932909. The reversal of 228932881 is 188239822.

228932881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228932881 - 2¹⁷ = 228801809 is a prime.

It is a super-2 number, since 2×228932881² = 104820528005920322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228932581) 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, 6024531 + ... + 6024568.

It is an arithmetic number, because the mean of its divisors is an integer number (60245500).

Almost surely, 2^228932881 is an apocalyptic number.

It is an amenable number.

228932881 is a deficient number, since it is larger than the sum of its proper divisors (12049119).

228932881 is a wasteful number, since it uses less digits than its factorization.

228932881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12049118.

The product of its digits is 110592, while the sum is 43.

The square root of 228932881 is about 15130.5281137176. The cubic root of 228932881 is about 611.7435390404.

The spelling of 228932881 in words is "two hundred twenty-eight million, nine hundred thirty-two thousand, eight hundred eighty-one".