216635053 has 4 divisors (see below), whose sum is σ = 219868480. Its totient is φ = 213401628.

The previous prime is 216635039. The next prime is 216635057. The reversal of 216635053 is 350536612.

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 a de Polignac number, because none of the positive numbers 2^k-216635053 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 (216635057) 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, 1616613 + ... + 1616746.

It is an arithmetic number, because the mean of its divisors is an integer number (54967120).

Almost surely, 2^216635053 is an apocalyptic number.

It is an amenable number.

216635053 is a deficient number, since it is larger than the sum of its proper divisors (3233427).

216635053 is an equidigital number, since it uses as much as digits as its factorization.

216635053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233426.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 216635053 is about 14718.5275418433. The cubic root of 216635053 is about 600.5874367129.

The spelling of 216635053 in words is "two hundred sixteen million, six hundred thirty-five thousand, fifty-three".