216202057 has 4 divisors (see below), whose sum is σ = 216469456. Its totient is φ = 215934660.

The previous prime is 216202033. The next prime is 216202067. The reversal of 216202057 is 750202612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216202057 - 2⁷ = 216201929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216202027) 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, 132483 + ... + 134104.

It is an arithmetic number, because the mean of its divisors is an integer number (54117364).

Almost surely, 2^216202057 is an apocalyptic number.

It is an amenable number.

216202057 is a deficient number, since it is larger than the sum of its proper divisors (267399).

216202057 is an equidigital number, since it uses as much as digits as its factorization.

216202057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267398.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 216202057 is about 14703.8109685891. The cubic root of 216202057 is about 600.1870315074.

Adding to 216202057 its reverse (750202612), we get a palindrome (966404669).

The spelling of 216202057 in words is "two hundred sixteen million, two hundred two thousand, fifty-seven".