229891331 has 2 divisors, whose sum is σ = 229891332. Its totient is φ = 229891330.

The previous prime is 229891327. The next prime is 229891339. The reversal of 229891331 is 133198922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229891331 - 2² = 229891327 is a prime.

It is a super-2 number, since 2×229891331² = 105700048137903122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (229891339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114945665 + 114945666.

It is an arithmetic number, because the mean of its divisors is an integer number (114945666).

Almost surely, 2^229891331 is an apocalyptic number.

229891331 is a deficient number, since it is larger than the sum of its proper divisors (1).

229891331 is an equidigital number, since it uses as much as digits as its factorization.

229891331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 229891331 is about 15162.1677539856. The cubic root of 229891331 is about 612.5960585703.

The spelling of 229891331 in words is "two hundred twenty-nine million, eight hundred ninety-one thousand, three hundred thirty-one".