51842238 has 32 divisors (see below), whose sum is σ = 120510720. Its totient is φ = 14560320.

The previous prime is 51842221. The next prime is 51842239. The reversal of 51842238 is 83224815.

It is a junction number, because it is equal to n+sod(n) for n = 51842199 and 51842208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51842239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7983 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (3765960).

Almost surely, 2^51842238 is an apocalyptic number.

51842238 is an abundant number, since it is smaller than the sum of its proper divisors (68668482).

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

51842238 is a wasteful number, since it uses less digits than its factorization.

51842238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992.

The product of its digits is 15360, while the sum is 33.

The square root of 51842238 is about 7200.1554149893. The cubic root of 51842238 is about 372.8732663675.

The spelling of 51842238 in words is "fifty-one million, eight hundred forty-two thousand, two hundred thirty-eight".