52525215721 has 8 divisors (see below), whose sum is σ = 57306953664. Its totient is φ = 47744597520.

The previous prime is 52525215697. The next prime is 52525215731. The reversal of 52525215721 is 12751252525.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52525215721 - 2²³ = 52516827113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52525215731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180306 + ... + 370891.

It is an arithmetic number, because the mean of its divisors is an integer number (7163369208).

Almost surely, 2^52525215721 is an apocalyptic number.

It is an amenable number.

52525215721 is a deficient number, since it is larger than the sum of its proper divisors (4781737943).

52525215721 is a wasteful number, since it uses less digits than its factorization.

52525215721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559871.

The product of its digits is 70000, while the sum is 37.

The spelling of 52525215721 in words is "fifty-two billion, five hundred twenty-five million, two hundred fifteen thousand, seven hundred twenty-one".