53815357 has 4 divisors (see below), whose sum is σ = 53903196. Its totient is φ = 53727520.

The previous prime is 53815313. The next prime is 53815367. The reversal of 53815357 is 75351835.

53815357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 28955161 + 24860196 = 5381^2 + 4986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53815357 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 (53815367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42994 + ... + 44227.

It is an arithmetic number, because the mean of its divisors is an integer number (13475799).

Almost surely, 2^53815357 is an apocalyptic number.

It is an amenable number.

53815357 is a deficient number, since it is larger than the sum of its proper divisors (87839).

53815357 is an equidigital number, since it uses as much as digits as its factorization.

53815357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87838.

The product of its digits is 63000, while the sum is 37.

The square root of 53815357 is about 7335.8951055751. The cubic root of 53815357 is about 377.5450163412.

The spelling of 53815357 in words is "fifty-three million, eight hundred fifteen thousand, three hundred fifty-seven".