53616553 has 4 divisors (see below), whose sum is σ = 53756928. Its totient is φ = 53476180.

The previous prime is 53616539. The next prime is 53616583. The reversal of 53616553 is 35561635.

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 53616553 - 2²⁵ = 20062121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53616503) 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, 69613 + ... + 70378.

It is an arithmetic number, because the mean of its divisors is an integer number (13439232).

Almost surely, 2^53616553 is an apocalyptic number.

It is an amenable number.

53616553 is a deficient number, since it is larger than the sum of its proper divisors (140375).

53616553 is a wasteful number, since it uses less digits than its factorization.

53616553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140374.

The product of its digits is 40500, while the sum is 34.

The square root of 53616553 is about 7322.3324835738. The cubic root of 53616553 is about 377.0795353633.

The spelling of 53616553 in words is "fifty-three million, six hundred sixteen thousand, five hundred fifty-three".