228180331 has 4 divisors (see below), whose sum is σ = 228210552. Its totient is φ = 228150112.

The previous prime is 228180319. The next prime is 228180343. The reversal of 228180331 is 133081822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (228180319) and next prime (228180343).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228180331 is a prime.

It is a super-2 number, since 2×228180331² = 104132526910539122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228180331.

It is not an unprimeable number, because it can be changed into a prime (228180301) 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, 7011 + ... + 22483.

It is an arithmetic number, because the mean of its divisors is an integer number (57052638).

Almost surely, 2^228180331 is an apocalyptic number.

228180331 is a deficient number, since it is larger than the sum of its proper divisors (30221).

228180331 is a wasteful number, since it uses less digits than its factorization.

228180331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30220.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 228180331 is about 15105.6390463959. The cubic root of 228180331 is about 611.0724937936.

The spelling of 228180331 in words is "two hundred twenty-eight million, one hundred eighty thousand, three hundred thirty-one".