51899239 has 8 divisors (see below), whose sum is σ = 61227008. Its totient is φ = 43049880.

The previous prime is 51899219. The next prime is 51899251. The reversal of 51899239 is 93299815.

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

It is a cyclic number.

It is not a de Polignac number, because 51899239 - 2⁹ = 51898727 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 (51899209) 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 7 ways as a sum of consecutive naturals, for example, 119367 + ... + 119800.

It is an arithmetic number, because the mean of its divisors is an integer number (7653376).

Almost surely, 2^51899239 is an apocalyptic number.

51899239 is a deficient number, since it is larger than the sum of its proper divisors (9327769).

51899239 is a wasteful number, since it uses less digits than its factorization.

51899239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239205.

The product of its digits is 174960, while the sum is 46.

The square root of 51899239 is about 7204.1126448717. The cubic root of 51899239 is about 373.0098754654.

The spelling of 51899239 in words is "fifty-one million, eight hundred ninety-nine thousand, two hundred thirty-nine".