51885138 has 16 divisors (see below), whose sum is σ = 103966560. Its totient is φ = 17262336.

The previous prime is 51885083. The next prime is 51885151. The reversal of 51885138 is 83158815.

51885138 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-3 number, since 3×51885138³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51885096 and 51885105.

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, 4623 + ... + 11186.

It is an arithmetic number, because the mean of its divisors is an integer number (6497910).

Almost surely, 2^51885138 is an apocalyptic number.

51885138 is an abundant number, since it is smaller than the sum of its proper divisors (52081422).

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

51885138 is a wasteful number, since it uses less digits than its factorization.

51885138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16361.

The product of its digits is 38400, while the sum is 39.

The square root of 51885138 is about 7203.1339012960. The cubic root of 51885138 is about 372.9760902000.

The spelling of 51885138 in words is "fifty-one million, eight hundred eighty-five thousand, one hundred thirty-eight".