53315557 has 4 divisors (see below), whose sum is σ = 54756556. Its totient is φ = 51874560.

The previous prime is 53315513. The next prime is 53315579. The reversal of 53315557 is 75551335.

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 51394561 + 1920996 = 7169^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 53315557 - 2⁷ = 53315429 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 (53315597) 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, 720444 + ... + 720517.

It is an arithmetic number, because the mean of its divisors is an integer number (13689139).

Almost surely, 2^53315557 is an apocalyptic number.

It is an amenable number.

53315557 is a deficient number, since it is larger than the sum of its proper divisors (1440999).

53315557 is a wasteful number, since it uses less digits than its factorization.

53315557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440998.

The product of its digits is 39375, while the sum is 34.

The square root of 53315557 is about 7301.7502696271. The cubic root of 53315557 is about 376.3725864799.

The spelling of 53315557 in words is "fifty-three million, three hundred fifteen thousand, five hundred fifty-seven".