51331158 has 20 divisors (see below), whose sum is σ = 115020180. Its totient is φ = 17110332.

The previous prime is 51331157. The next prime is 51331169. The reversal of 51331158 is 85113315.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51331151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 158268 + ... + 158591.

It is an arithmetic number, because the mean of its divisors is an integer number (5751009).

Almost surely, 2^51331158 is an apocalyptic number.

51331158 is an abundant number, since it is smaller than the sum of its proper divisors (63689022).

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

51331158 is a wasteful number, since it uses less digits than its factorization.

51331158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316873 (or 316864 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 51331158 is about 7164.5766099610. The cubic root of 51331158 is about 371.6439100288.

The spelling of 51331158 in words is "fifty-one million, three hundred thirty-one thousand, one hundred fifty-eight".