52139816 has 32 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 24300288.

The previous prime is 52139809. The next prime is 52139821. The reversal of 52139816 is 61893125.

52139816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 12761 + ... + 16343.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^52139816 is an apocalyptic number.

It is an amenable number.

52139816 is an abundant number, since it is smaller than the sum of its proper divisors (52369624).

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

52139816 is a wasteful number, since it uses less digits than its factorization.

52139816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3709 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 52139816 is about 7220.7905384383. The cubic root of 52139816 is about 373.5853450104.

The spelling of 52139816 in words is "fifty-two million, one hundred thirty-nine thousand, eight hundred sixteen".