53555915 has 12 divisors (see below), whose sum is σ = 73507536. Its totient is φ = 36694368.

The previous prime is 53555869. The next prime is 53555923. The reversal of 53555915 is 51955535.

53555915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53555915 - 2⁸ = 53555659 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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 11 ways as a sum of consecutive naturals, for example, 42677 + ... + 43913.

It is an arithmetic number, because the mean of its divisors is an integer number (6125628).

Almost surely, 2^53555915 is an apocalyptic number.

53555915 is a deficient number, since it is larger than the sum of its proper divisors (19951621).

53555915 is an frugal number, since it uses more digits than its factorization.

53555915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 1249 counting only the distinct ones).

The product of its digits is 84375, while the sum is 38.

The square root of 53555915 is about 7318.1906916942. The cubic root of 53555915 is about 376.9373281970.

The spelling of 53555915 in words is "fifty-three million, five hundred fifty-five thousand, nine hundred fifteen".