53621785 has 32 divisors (see below), whose sum is σ = 77064192. Its totient is φ = 35043840.

The previous prime is 53621779. The next prime is 53621797. The reversal of 53621785 is 58712635.

It is not a de Polignac number, because 53621785 - 2⁵ = 53621753 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 (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78867 + ... + 79543.

It is an arithmetic number, because the mean of its divisors is an integer number (2408256).

Almost surely, 2^53621785 is an apocalyptic number.

It is an amenable number.

53621785 is a deficient number, since it is larger than the sum of its proper divisors (23442407).

53621785 is a wasteful number, since it uses less digits than its factorization.

53621785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its digits is 50400, while the sum is 37.

The square root of 53621785 is about 7322.6897380676. The cubic root of 53621785 is about 377.0918003315.

The spelling of 53621785 in words is "fifty-three million, six hundred twenty-one thousand, seven hundred eighty-five".