51839239 has 12 divisors (see below), whose sum is σ = 57936384. Its totient is φ = 46216512.

The previous prime is 51839231. The next prime is 51839243. The reversal of 51839239 is 93293815.

It is not a de Polignac number, because 51839239 - 2³ = 51839231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51839231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1914 + ... + 10360.

It is an arithmetic number, because the mean of its divisors is an integer number (4828032).

Almost surely, 2^51839239 is an apocalyptic number.

51839239 is a deficient number, since it is larger than the sum of its proper divisors (6097145).

51839239 is a wasteful number, since it uses less digits than its factorization.

51839239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502 (or 8483 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 51839239 is about 7199.9471525838. The cubic root of 51839239 is about 372.8660761655.

The spelling of 51839239 in words is "fifty-one million, eight hundred thirty-nine thousand, two hundred thirty-nine".