53819915 has 4 divisors (see below), whose sum is σ = 64583904. Its totient is φ = 43055928.

The previous prime is 53819903. The next prime is 53819923. The reversal of 53819915 is 51991835.

53819915 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 is a cyclic number.

It is not a de Polignac number, because 53819915 - 2⁶ = 53819851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5381987 + ... + 5381996.

It is an arithmetic number, because the mean of its divisors is an integer number (16145976).

Almost surely, 2^53819915 is an apocalyptic number.

53819915 is a deficient number, since it is larger than the sum of its proper divisors (10763989).

53819915 is a wasteful number, since it uses less digits than its factorization.

53819915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763988.

The product of its digits is 48600, while the sum is 41.

The square root of 53819915 is about 7336.2057631994. The cubic root of 53819915 is about 377.5556750187. Note that the first 3 decimals are identical.

The spelling of 53819915 in words is "fifty-three million, eight hundred nineteen thousand, nine hundred fifteen".