52186221 has 8 divisors (see below), whose sum is σ = 77312960. Its totient is φ = 34790796.

The previous prime is 52186193. The next prime is 52186223. The reversal of 52186221 is 12268125.

It is a happy number.

52186221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52186221 - 2⁶ = 52186157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1932823 = 52186221 / (5 + 2 + 1 + 8 + 6 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52186223) 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 7 ways as a sum of consecutive naturals, for example, 966385 + ... + 966438.

It is an arithmetic number, because the mean of its divisors is an integer number (9664120).

Almost surely, 2^52186221 is an apocalyptic number.

It is an amenable number.

52186221 is a deficient number, since it is larger than the sum of its proper divisors (25126739).

52186221 is a wasteful number, since it uses less digits than its factorization.

52186221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932832 (or 1932826 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 52186221 is about 7224.0031146173. The cubic root of 52186221 is about 373.6961438116.

The spelling of 52186221 in words is "fifty-two million, one hundred eighty-six thousand, two hundred twenty-one".