52000138 has 4 divisors (see below), whose sum is σ = 78000210. Its totient is φ = 26000068.

The previous prime is 52000087. The next prime is 52000139. The reversal of 52000138 is 83100025.

It is a happy number.

52000138 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 only one way, i.e., 29560969 + 22439169 = 5437^2 + 4737^2 .

It is not an unprimeable number, because it can be changed into a prime (52000139) 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 as a sum of consecutive naturals, namely, 13000033 + ... + 13000036.

Almost surely, 2^52000138 is an apocalyptic number.

52000138 is a deficient number, since it is larger than the sum of its proper divisors (26000072).

52000138 is a wasteful number, since it uses less digits than its factorization.

52000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26000071.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 52000138 is about 7211.1121195000. The cubic root of 52000138 is about 373.2514458651.

The spelling of 52000138 in words is "fifty-two million, one hundred thirty-eight", and thus it is an aban number.