53178813 has 12 divisors (see below), whose sum is σ = 77088960. Its totient is φ = 35325576.

The previous prime is 53178809. The next prime is 53178833. The reversal of 53178813 is 31887135.

It is not a de Polignac number, because 53178813 - 2² = 53178809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53178803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7893 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (6424080).

Almost surely, 2^53178813 is an apocalyptic number.

It is an amenable number.

53178813 is a deficient number, since it is larger than the sum of its proper divisors (23910147).

53178813 is a wasteful number, since it uses less digits than its factorization.

53178813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21168 (or 21165 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 53178813 is about 7292.3804755375. The cubic root of 53178813 is about 376.0505369110.

The spelling of 53178813 in words is "fifty-three million, one hundred seventy-eight thousand, eight hundred thirteen".