52143531221 has 4 divisors (see below), whose sum is σ = 52803576000. Its totient is φ = 51483486444.

The previous prime is 52143531203. The next prime is 52143531247. The reversal of 52143531221 is 12213534125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52143531221 - 2⁶ = 52143531157 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 (52143531521) 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, 330022271 + ... + 330022428.

It is an arithmetic number, because the mean of its divisors is an integer number (13200894000).

Almost surely, 2^52143531221 is an apocalyptic number.

It is an amenable number.

52143531221 is a deficient number, since it is larger than the sum of its proper divisors (660044779).

52143531221 is an equidigital number, since it uses as much as digits as its factorization.

52143531221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660044778.

The product of its digits is 7200, while the sum is 29.

The spelling of 52143531221 in words is "fifty-two billion, one hundred forty-three million, five hundred thirty-one thousand, two hundred twenty-one".