51431708161 has 8 divisors (see below), whose sum is σ = 52529635584. Its totient is φ = 50333932320.

The previous prime is 51431708143. The next prime is 51431708173. The reversal of 51431708161 is 16180713415.

It is a happy number.

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 51431708161 - 2¹⁷ = 51431577089 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 51431708161.

It is not an unprimeable number, because it can be changed into a prime (51431705161) 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, 885196 + ... + 941506.

It is an arithmetic number, because the mean of its divisors is an integer number (6566204448).

Almost surely, 2^51431708161 is an apocalyptic number.

It is an amenable number.

51431708161 is a deficient number, since it is larger than the sum of its proper divisors (1097927423).

51431708161 is a wasteful number, since it uses less digits than its factorization.

51431708161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75791.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 51431708161 in words is "fifty-one billion, four hundred thirty-one million, seven hundred eight thousand, one hundred sixty-one".