51313015205 has 32 divisors (see below), whose sum is σ = 65121239040. Its totient is φ = 38753951040.

The previous prime is 51313015183. The next prime is 51313015211. The reversal of 51313015205 is 50251031315.

It is a happy number.

It is not a de Polignac number, because 51313015205 - 2²⁸ = 51044579749 is a prime.

It is a super-2 number, since 2×51313015205² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5880836 + ... + 5889554.

It is an arithmetic number, because the mean of its divisors is an integer number (2035038720).

Almost surely, 2^51313015205 is an apocalyptic number.

It is an amenable number.

51313015205 is a deficient number, since it is larger than the sum of its proper divisors (13808223835).

51313015205 is a wasteful number, since it uses less digits than its factorization.

51313015205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 51313015205 in words is "fifty-one billion, three hundred thirteen million, fifteen thousand, two hundred five".