52215555621 has 16 divisors (see below), whose sum is σ = 73165235264. Its totient is φ = 33081882624.

The previous prime is 52215555487. The next prime is 52215555659. The reversal of 52215555621 is 12655551225.

It is not a de Polignac number, because 52215555621 - 2²⁵ = 52182001189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52215555621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52215556621) 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, 5465116 + ... + 5474661.

It is an arithmetic number, because the mean of its divisors is an integer number (4572827204).

Almost surely, 2^52215555621 is an apocalyptic number.

It is an amenable number.

52215555621 is a deficient number, since it is larger than the sum of its proper divisors (20949679643).

52215555621 is a wasteful number, since it uses less digits than its factorization.

52215555621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939860.

The product of its digits is 150000, while the sum is 39.

The spelling of 52215555621 in words is "fifty-two billion, two hundred fifteen million, five hundred fifty-five thousand, six hundred twenty-one".