51814239 has 16 divisors (see below), whose sum is σ = 72563712. Its totient is φ = 32823648.

The previous prime is 51814223. The next prime is 51814241. The reversal of 51814239 is 93241815.

It is not a de Polignac number, because 51814239 - 2⁴ = 51814223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51814439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8442 + ... + 13224.

It is an arithmetic number, because the mean of its divisors is an integer number (4535232).

Almost surely, 2^51814239 is an apocalyptic number.

51814239 is a deficient number, since it is larger than the sum of its proper divisors (20749473).

51814239 is a wasteful number, since it uses less digits than its factorization.

51814239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966.

The product of its digits is 8640, while the sum is 33.

The square root of 51814239 is about 7198.2108193634. The cubic root of 51814239 is about 372.8061270422.

The spelling of 51814239 in words is "fifty-one million, eight hundred fourteen thousand, two hundred thirty-nine".