216433057 has 2 divisors, whose sum is σ = 216433058. Its totient is φ = 216433056.

The previous prime is 216433031. The next prime is 216433067. The reversal of 216433057 is 750334612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162792081 + 53640976 = 12759^2 + 7324^2 .

It is a cyclic number.

It is not a de Polignac number, because 216433057 - 2⁷ = 216432929 is a prime.

It is not a weakly prime, because it can be changed into another prime (216433067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108216528 + 108216529.

It is an arithmetic number, because the mean of its divisors is an integer number (108216529).

Almost surely, 2^216433057 is an apocalyptic number.

It is an amenable number.

216433057 is a deficient number, since it is larger than the sum of its proper divisors (1).

216433057 is an equidigital number, since it uses as much as digits as its factorization.

216433057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 216433057 is about 14711.6639779462. The cubic root of 216433057 is about 600.4007110286.

Adding to 216433057 its reverse (750334612), we get a palindrome (966767669).

The spelling of 216433057 in words is "two hundred sixteen million, four hundred thirty-three thousand, fifty-seven".