216360553 has 4 divisors (see below), whose sum is σ = 216391168. Its totient is φ = 216329940.

The previous prime is 216360541. The next prime is 216360559. The reversal of 216360553 is 355063612.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 216360553 - 2²⁵ = 182806121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216360559) 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, 1300 + ... + 20842.

It is an arithmetic number, because the mean of its divisors is an integer number (54097792).

Almost surely, 2^216360553 is an apocalyptic number.

It is an amenable number.

216360553 is a deficient number, since it is larger than the sum of its proper divisors (30615).

216360553 is a wasteful number, since it uses less digits than its factorization.

216360553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30614.

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

The square root of 216360553 is about 14709.1996043293. The cubic root of 216360553 is about 600.3336597879. Note that the first 3 decimals are identical.

The spelling of 216360553 in words is "two hundred sixteen million, three hundred sixty thousand, five hundred fifty-three".