228636331 has 8 divisors (see below), whose sum is σ = 285053184. Its totient is φ = 178158120.

The previous prime is 228636323. The next prime is 228636337. The reversal of 228636331 is 133636822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228636331 - 2³ = 228636323 is a prime.

It is a super-2 number, since 2×228636331² = 104549143706283122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228636337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484575 + ... + 1484728.

It is an arithmetic number, because the mean of its divisors is an integer number (35631648).

Almost surely, 2^228636331 is an apocalyptic number.

228636331 is a deficient number, since it is larger than the sum of its proper divisors (56416853).

228636331 is a wasteful number, since it uses less digits than its factorization.

228636331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969321.

The product of its digits is 31104, while the sum is 34.

The square root of 228636331 is about 15120.7252140894. The cubic root of 228636331 is about 611.4792826442.

The spelling of 228636331 in words is "two hundred twenty-eight million, six hundred thirty-six thousand, three hundred thirty-one".