51538242 has 16 divisors (see below), whose sum is σ = 117801792. Its totient is φ = 14725200.

The previous prime is 51538171. The next prime is 51538297. The reversal of 51538242 is 24283515.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613509 + ... + 613592.

It is an arithmetic number, because the mean of its divisors is an integer number (7362612).

Almost surely, 2^51538242 is an apocalyptic number.

51538242 is an abundant number, since it is smaller than the sum of its proper divisors (66263550).

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

51538242 is a wasteful number, since it uses less digits than its factorization.

51538242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227113.

The product of its digits is 9600, while the sum is 30.

The square root of 51538242 is about 7179.0139991506. The cubic root of 51538242 is about 372.1430106866.

The spelling of 51538242 in words is "fifty-one million, five hundred thirty-eight thousand, two hundred forty-two".