51318392597 has 8 divisors (see below), whose sum is σ = 51833309400. Its totient is φ = 50803609600.

The previous prime is 51318392561. The next prime is 51318392599. The reversal of 51318392597 is 79529381315.

51318392597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 37043161156 + 14275231441 = 192466^2 + 119479^2 .

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 51318392597 - 2²² = 51314198293 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 (51318392599) 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, 855029 + ... + 913077.

It is an arithmetic number, because the mean of its divisors is an integer number (6479163675).

Almost surely, 2^51318392597 is an apocalyptic number.

It is an amenable number.

51318392597 is a deficient number, since it is larger than the sum of its proper divisors (514916803).

51318392597 is a wasteful number, since it uses less digits than its factorization.

51318392597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66903.

The product of its digits is 2041200, while the sum is 53.

The spelling of 51318392597 in words is "fifty-one billion, three hundred eighteen million, three hundred ninety-two thousand, five hundred ninety-seven".