51157938 has 32 divisors (see below), whose sum is σ = 110468736. Its totient is φ = 15700608.

The previous prime is 51157933. The next prime is 51157961. The reversal of 51157938 is 83975115.

51157938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51157896 and 51157905.

It is not an unprimeable number, because it can be changed into a prime (51157933) 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 in 15 ways as a sum of consecutive naturals, for example, 47595 + ... + 48657.

It is an arithmetic number, because the mean of its divisors is an integer number (3452148).

Almost surely, 2^51157938 is an apocalyptic number.

51157938 is an abundant number, since it is smaller than the sum of its proper divisors (59310798).

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

51157938 is a wasteful number, since it uses less digits than its factorization.

51157938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698.

The product of its digits is 37800, while the sum is 39.

The square root of 51157938 is about 7152.4777524995. The cubic root of 51157938 is about 371.2253941905.

The spelling of 51157938 in words is "fifty-one million, one hundred fifty-seven thousand, nine hundred thirty-eight".