216204053 has 4 divisors (see below), whose sum is σ = 232835148. Its totient is φ = 199572960.

The previous prime is 216204049. The next prime is 216204073. The reversal of 216204053 is 350402612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18464209 + 197739844 = 4297^2 + 14062^2 .

It is a cyclic number.

It is not a de Polignac number, because 216204053 - 2² = 216204049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216204073) 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, 8315528 + ... + 8315553.

It is an arithmetic number, because the mean of its divisors is an integer number (58208787).

Almost surely, 2^216204053 is an apocalyptic number.

It is an amenable number.

216204053 is a deficient number, since it is larger than the sum of its proper divisors (16631095).

216204053 is a wasteful number, since it uses less digits than its factorization.

216204053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631094.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 216204053 is about 14703.8788419927. The cubic root of 216204053 is about 600.1888784982.

Adding to 216204053 its reverse (350402612), we get a palindrome (566606665).

The spelling of 216204053 in words is "two hundred sixteen million, two hundred four thousand, fifty-three".