228881831 has 2 divisors, whose sum is σ = 228881832. Its totient is φ = 228881830.

The previous prime is 228881801. The next prime is 228881867. The reversal of 228881831 is 138188822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228881831 - 2²² = 224687527 is a prime.

It is a super-2 number, since 2×228881831² = 104773785123825122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228881801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114440915 + 114440916.

It is an arithmetic number, because the mean of its divisors is an integer number (114440916).

Almost surely, 2^228881831 is an apocalyptic number.

228881831 is a deficient number, since it is larger than the sum of its proper divisors (1).

228881831 is an equidigital number, since it uses as much as digits as its factorization.

228881831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49152, while the sum is 41.

The square root of 228881831 is about 15128.8410329410. The cubic root of 228881831 is about 611.6980645341.

The spelling of 228881831 in words is "two hundred twenty-eight million, eight hundred eighty-one thousand, eight hundred thirty-one".