52351537621 has 16 divisors (see below), whose sum is σ = 55657393920. Its totient is φ = 49241438400.

The previous prime is 52351537603. The next prime is 52351537627. The reversal of 52351537621 is 12673515325.

It is a happy number.

It is not a de Polignac number, because 52351537621 - 2⁷ = 52351537493 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 (52351537627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13592346 + ... + 13596196.

It is an arithmetic number, because the mean of its divisors is an integer number (3478587120).

Almost surely, 2^52351537621 is an apocalyptic number.

It is an amenable number.

52351537621 is a deficient number, since it is larger than the sum of its proper divisors (3305856299).

52351537621 is an equidigital number, since it uses as much as digits as its factorization.

52351537621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669 (or 6635 counting only the distinct ones).

The product of its digits is 189000, while the sum is 40.

The spelling of 52351537621 in words is "fifty-two billion, three hundred fifty-one million, five hundred thirty-seven thousand, six hundred twenty-one".