51212310311005 has 16 divisors (see below), whose sum is σ = 64127714878080. Its totient is φ = 39187941905728.

The previous prime is 51212310310949. The next prime is 51212310311011. The reversal of 51212310311005 is 50011301321215.

51212310311005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51212310311005 is a prime.

It is a super-2 number, since 2×51212310311005² (a number of 28 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 15 ways as a sum of consecutive naturals, for example, 4049931 + ... + 10900759.

It is an arithmetic number, because the mean of its divisors is an integer number (4007982179880).

Almost surely, 2^{51212310311005} is an apocalyptic number.

It is an amenable number.

51212310311005 is a deficient number, since it is larger than the sum of its proper divisors (12915404567075).

51212310311005 is a wasteful number, since it uses less digits than its factorization.

51212310311005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915860.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 51212310311005 in words is "fifty-one trillion, two hundred twelve billion, three hundred ten million, three hundred eleven thousand, five".