52221701891 has 4 divisors (see below), whose sum is σ = 52231104912. Its totient is φ = 52212298872.

The previous prime is 52221701843. The next prime is 52221701893. The reversal of 52221701891 is 19810712225.

52221701891 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52221701891 is a prime.

It is a super-2 number, since 2×52221701891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52221701893) 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, 4693175 + ... + 4704288.

It is an arithmetic number, because the mean of its divisors is an integer number (13057776228).

Almost surely, 2^52221701891 is an apocalyptic number.

52221701891 is a deficient number, since it is larger than the sum of its proper divisors (9403021).

52221701891 is an equidigital number, since it uses as much as digits as its factorization.

52221701891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9403020.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 52221701891 in words is "fifty-two billion, two hundred twenty-one million, seven hundred one thousand, eight hundred ninety-one".