51431359 has 8 divisors (see below), whose sum is σ = 59888160. Its totient is φ = 43251936.

The previous prime is 51431329. The next prime is 51431363. The reversal of 51431359 is 95313415.

It is a happy number.

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

It is not a de Polignac number, because 51431359 - 2⁵ = 51431327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51431359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431329) 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, 68944 + ... + 69685.

It is an arithmetic number, because the mean of its divisors is an integer number (7486020).

Almost surely, 2^51431359 is an apocalyptic number.

51431359 is a deficient number, since it is larger than the sum of its proper divisors (8456801).

51431359 is a wasteful number, since it uses less digits than its factorization.

51431359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138689.

The product of its digits is 8100, while the sum is 31.

The square root of 51431359 is about 7171.5660075049. The cubic root of 51431359 is about 371.8855753789.

The spelling of 51431359 in words is "fifty-one million, four hundred thirty-one thousand, three hundred fifty-nine".