53621620 has 24 divisors (see below), whose sum is σ = 121267944. Its totient is φ = 19798656.

The previous prime is 53621611. The next prime is 53621657. The reversal of 53621620 is 2612635.

53621620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12096484 + 41525136 = 3478^2 + 6444^2 .

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 102859 + ... + 103378.

It is an arithmetic number, because the mean of its divisors is an integer number (5052831).

Almost surely, 2^53621620 is an apocalyptic number.

It is an amenable number.

53621620 is an abundant number, since it is smaller than the sum of its proper divisors (67646324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53621620 is a wasteful number, since it uses less digits than its factorization.

53621620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206259 (or 206257 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 53621620 is about 7322.6784717069. The cubic root of 53621620 is about 377.0914135471.

The spelling of 53621620 in words is "fifty-three million, six hundred twenty-one thousand, six hundred twenty".