52228139 has 8 divisors (see below), whose sum is σ = 54216768. Its totient is φ = 50276160.

The previous prime is 52228123. The next prime is 52228171. The reversal of 52228139 is 93182225.

It is a happy number.

52228139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52228139 - 2⁴ = 52228123 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (52228109) 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, 6242 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (6777096).

Almost surely, 2^52228139 is an apocalyptic number.

52228139 is a deficient number, since it is larger than the sum of its proper divisors (1988629).

52228139 is a wasteful number, since it uses less digits than its factorization.

52228139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18325.

The product of its digits is 8640, while the sum is 32.

The square root of 52228139 is about 7226.9038322092. The cubic root of 52228139 is about 373.7961727873.

The spelling of 52228139 in words is "fifty-two million, two hundred twenty-eight thousand, one hundred thirty-nine".