51840339 has 8 divisors (see below), whose sum is σ = 71350272. Its totient is φ = 33445320.

The previous prime is 51840337. The next prime is 51840377. The reversal of 51840339 is 93304815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51840339 - 2¹ = 51840337 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51840331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278619 + ... + 278804.

It is an arithmetic number, because the mean of its divisors is an integer number (8918784).

Almost surely, 2^51840339 is an apocalyptic number.

51840339 is a deficient number, since it is larger than the sum of its proper divisors (19509933).

51840339 is a wasteful number, since it uses less digits than its factorization.

51840339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557457.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 51840339 is about 7200.0235416282. The cubic root of 51840339 is about 372.8687134842.

The spelling of 51840339 in words is "fifty-one million, eight hundred forty thousand, three hundred thirty-nine".