52205431202021 has 4 divisors (see below), whose sum is σ = 52227808157292. Its totient is φ = 52183054246752.

The previous prime is 52205431201951. The next prime is 52205431202047. The reversal of 52205431202021 is 12020213450225.

It is a happy number.

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 25988727151396 + 26216704050625 = 5097914^2 + 5120225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52205431202021 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 (52205431202521) 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, 11188474136 + ... + 11188478801.

It is an arithmetic number, because the mean of its divisors is an integer number (13056952039323).

Almost surely, 2^{52205431202021} is an apocalyptic number.

It is an amenable number.

52205431202021 is a deficient number, since it is larger than the sum of its proper divisors (22376955271).

52205431202021 is a wasteful number, since it uses less digits than its factorization.

52205431202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22376955270.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 52205431202021 its reverse (12020213450225), we get a palindrome (64225644652246).

The spelling of 52205431202021 in words is "fifty-two trillion, two hundred five billion, four hundred thirty-one million, two hundred two thousand, twenty-one".