51349915318 has 32 divisors (see below), whose sum is σ = 92451875040. Its totient is φ = 21131850240.

The previous prime is 51349915271. The next prime is 51349915361. The reversal of 51349915318 is 81351994315.

It is a happy number.

It is a super-2 number, since 2×51349915318² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3048873 + ... + 3065668.

It is an arithmetic number, because the mean of its divisors is an integer number (2889121095).

Almost surely, 2^51349915318 is an apocalyptic number.

51349915318 is a deficient number, since it is larger than the sum of its proper divisors (41101959722).

51349915318 is a wasteful number, since it uses less digits than its factorization.

51349915318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114592.

The product of its digits is 583200, while the sum is 49.

The spelling of 51349915318 in words is "fifty-one billion, three hundred forty-nine million, nine hundred fifteen thousand, three hundred eighteen".