52011564221 has 4 divisors (see below), whose sum is σ = 52547766012. Its totient is φ = 51475362432.

The previous prime is 52011564181. The next prime is 52011564251. The reversal of 52011564221 is 12246511025.

52011564221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12813108025 + 39198456196 = 113195^2 + 197986^2 .

It is a cyclic number.

It is not a de Polignac number, because 52011564221 - 2¹⁴ = 52011547837 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 (52011564251) 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, 268100750 + ... + 268100943.

It is an arithmetic number, because the mean of its divisors is an integer number (13136941503).

Almost surely, 2^52011564221 is an apocalyptic number.

It is an amenable number.

52011564221 is a deficient number, since it is larger than the sum of its proper divisors (536201791).

52011564221 is an equidigital number, since it uses as much as digits as its factorization.

52011564221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536201790.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 52011564221 in words is "fifty-two billion, eleven million, five hundred sixty-four thousand, two hundred twenty-one".