51885238 has 16 divisors (see below), whose sum is σ = 83082240. Its totient is φ = 24229800.

The previous prime is 51885233. The next prime is 51885247. The reversal of 51885238 is 83258815.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 51885238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51885233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6918 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (5192640).

Almost surely, 2^51885238 is an apocalyptic number.

51885238 is a deficient number, since it is larger than the sum of its proper divisors (31197002).

51885238 is a wasteful number, since it uses less digits than its factorization.

51885238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19323.

The product of its digits is 76800, while the sum is 40.

The square root of 51885238 is about 7203.1408427158. The cubic root of 51885238 is about 372.9763298164.

The spelling of 51885238 in words is "fifty-one million, eight hundred eighty-five thousand, two hundred thirty-eight".