52212138 has 16 divisors (see below), whose sum is σ = 113917536. Its totient is φ = 15821840.

The previous prime is 52212137. The next prime is 52212163. The reversal of 52212138 is 83121225.

52212138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×52212138² = 5452214709062088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52212131) 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, 395481 + ... + 395612.

It is an arithmetic number, because the mean of its divisors is an integer number (7119846).

Almost surely, 2^52212138 is an apocalyptic number.

52212138 is an abundant number, since it is smaller than the sum of its proper divisors (61705398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52212138 is a wasteful number, since it uses less digits than its factorization.

52212138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791109.

The product of its digits is 960, while the sum is 24.

The square root of 52212138 is about 7225.7967034784. The cubic root of 52212138 is about 373.7579958991.

The spelling of 52212138 in words is "fifty-two million, two hundred twelve thousand, one hundred thirty-eight".