52628252221 has 4 divisors (see below), whose sum is σ = 52892716000. Its totient is φ = 52363788444.

The previous prime is 52628252177. The next prime is 52628252227. The reversal of 52628252221 is 12225282625.

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 52628252221 - 2⁷ = 52628252093 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 (52628252227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132231591 + ... + 132231988.

It is an arithmetic number, because the mean of its divisors is an integer number (13223179000).

Almost surely, 2^52628252221 is an apocalyptic number.

It is an amenable number.

52628252221 is a deficient number, since it is larger than the sum of its proper divisors (264463779).

52628252221 is a wasteful number, since it uses less digits than its factorization.

52628252221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264463778.

The product of its digits is 76800, while the sum is 37.

The spelling of 52628252221 in words is "fifty-two billion, six hundred twenty-eight million, two hundred fifty-two thousand, two hundred twenty-one".