53495621 has 4 divisors (see below), whose sum is σ = 56311200. Its totient is φ = 50680044.

The previous prime is 53495593. The next prime is 53495627. The reversal of 53495621 is 12659435.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53495621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53495627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407761 + ... + 1407798.

It is an arithmetic number, because the mean of its divisors is an integer number (14077800).

Almost surely, 2^53495621 is an apocalyptic number.

It is an amenable number.

53495621 is a deficient number, since it is larger than the sum of its proper divisors (2815579).

53495621 is a wasteful number, since it uses less digits than its factorization.

53495621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815578.

The product of its digits is 32400, while the sum is 35.

The square root of 53495621 is about 7314.0700707609. The cubic root of 53495621 is about 376.7958213039.

The spelling of 53495621 in words is "fifty-three million, four hundred ninety-five thousand, six hundred twenty-one".