53616557 has 4 divisors (see below), whose sum is σ = 54147516. Its totient is φ = 53085600.

The previous prime is 53616539. The next prime is 53616583. The reversal of 53616557 is 75561635.

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 43414921 + 10201636 = 6589^2 + 3194^2 .

It is not a de Polignac number, because 53616557 - 2¹⁰ = 53615533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53616557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53616757) 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, 265328 + ... + 265529.

It is an arithmetic number, because the mean of its divisors is an integer number (13536879).

Almost surely, 2^53616557 is an apocalyptic number.

It is an amenable number.

53616557 is a deficient number, since it is larger than the sum of its proper divisors (530959).

53616557 is a wasteful number, since it uses less digits than its factorization.

53616557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530958.

The product of its digits is 94500, while the sum is 38.

The square root of 53616557 is about 7322.3327567108. The cubic root of 53616557 is about 377.0795447404.

The spelling of 53616557 in words is "fifty-three million, six hundred sixteen thousand, five hundred fifty-seven".