52222182181 has 4 divisors (see below), whose sum is σ = 56239273132. Its totient is φ = 48205091232.

The previous prime is 52222182169. The next prime is 52222182191. The reversal of 52222182181 is 18128122225.

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 25405172100 + 26817010081 = 159390^2 + 163759^2 .

It is a cyclic number.

It is not a de Polignac number, because 52222182181 - 2⁵ = 52222182149 is a prime.

It is a super-2 number, since 2×52222182181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52222182161) 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, 2008545456 + ... + 2008545481.

It is an arithmetic number, because the mean of its divisors is an integer number (14059818283).

Almost surely, 2^52222182181 is an apocalyptic number.

It is an amenable number.

52222182181 is a deficient number, since it is larger than the sum of its proper divisors (4017090951).

52222182181 is a wasteful number, since it uses less digits than its factorization.

52222182181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017090950.

The product of its digits is 10240, while the sum is 34.

The spelling of 52222182181 in words is "fifty-two billion, two hundred twenty-two million, one hundred eighty-two thousand, one hundred eighty-one".