216938053 has 4 divisors (see below), whose sum is σ = 221983168. Its totient is φ = 211892940.

The previous prime is 216938023. The next prime is 216938081. The reversal of 216938053 is 350839612.

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 216938053 - 2²⁵ = 183383621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216938023) 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, 2522493 + ... + 2522578.

It is an arithmetic number, because the mean of its divisors is an integer number (55495792).

Almost surely, 2^216938053 is an apocalyptic number.

It is an amenable number.

216938053 is a deficient number, since it is larger than the sum of its proper divisors (5045115).

216938053 is an equidigital number, since it uses as much as digits as its factorization.

216938053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045114.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 216938053 is about 14728.8170943902. The cubic root of 216938053 is about 600.8673132680.

The spelling of 216938053 in words is "two hundred sixteen million, nine hundred thirty-eight thousand, fifty-three".