53363991 has 16 divisors (see below), whose sum is σ = 72190976. Its totient is φ = 35060256.

The previous prime is 53363983. The next prime is 53364013. The reversal of 53363991 is 19936335.

53363991 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 53363991 - 2³ = 53363983 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 (53363491) 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 15 ways as a sum of consecutive naturals, for example, 115026 + ... + 115488.

It is an arithmetic number, because the mean of its divisors is an integer number (4511936).

Almost surely, 2^53363991 is an apocalyptic number.

53363991 is a deficient number, since it is larger than the sum of its proper divisors (18826985).

53363991 is a wasteful number, since it uses less digits than its factorization.

53363991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

The product of its digits is 65610, while the sum is 39.

The square root of 53363991 is about 7305.0661187973. The cubic root of 53363991 is about 376.4865226592.

The spelling of 53363991 in words is "fifty-three million, three hundred sixty-three thousand, nine hundred ninety-one".