52228181 has 4 divisors (see below), whose sum is σ = 52530252. Its totient is φ = 51926112.

The previous prime is 52228177. The next prime is 52228223. The reversal of 52228181 is 18182225.

It is a happy number.

52228181 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 can be written as a sum of positive squares in 2 ways, for example, as 46799281 + 5428900 = 6841^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 52228181 - 2² = 52228177 is a prime.

It is a super-2 number, since 2×52228181² = 5455565781137522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52228171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150776 + ... + 151121.

It is an arithmetic number, because the mean of its divisors is an integer number (13132563).

Almost surely, 2^52228181 is an apocalyptic number.

It is an amenable number.

52228181 is a deficient number, since it is larger than the sum of its proper divisors (302071).

52228181 is a wasteful number, since it uses less digits than its factorization.

52228181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302070.

The product of its digits is 2560, while the sum is 29.

The square root of 52228181 is about 7226.9067380173. The cubic root of 52228181 is about 373.7962729851.

The spelling of 52228181 in words is "fifty-two million, two hundred twenty-eight thousand, one hundred eighty-one".