52520020451 has 4 divisors (see below), whose sum is σ = 52529918400. Its totient is φ = 52510122504.

The previous prime is 52520020391. The next prime is 52520020463. The reversal of 52520020451 is 15402002525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52520020451 - 2³⁴ = 35340151267 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 52520020451.

It is not an unprimeable number, because it can be changed into a prime (52520025451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4941011 + ... + 4951628.

It is an arithmetic number, because the mean of its divisors is an integer number (13132479600).

Almost surely, 2^52520020451 is an apocalyptic number.

52520020451 is a deficient number, since it is larger than the sum of its proper divisors (9897949).

52520020451 is an equidigital number, since it uses as much as digits as its factorization.

52520020451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897948.

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 52520020451 its reverse (15402002525), we get a palindrome (67922022976).

The spelling of 52520020451 in words is "fifty-two billion, five hundred twenty million, twenty thousand, four hundred fifty-one".