51306511305 has 32 divisors (see below), whose sum is σ = 97052716800. Its totient is φ = 22645631232.

The previous prime is 51306511303. The next prime is 51306511331. The reversal of 51306511305 is 50311560315.

It is not a de Polignac number, because 51306511305 - 2¹ = 51306511303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51306511301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8421670 + ... + 8427759.

It is an arithmetic number, because the mean of its divisors is an integer number (3032897400).

Almost surely, 2^51306511305 is an apocalyptic number.

It is an amenable number.

51306511305 is a deficient number, since it is larger than the sum of its proper divisors (45746205495).

51306511305 is a wasteful number, since it uses less digits than its factorization.

51306511305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16849473.

The product of its (nonzero) digits is 6750, while the sum is 30.

The spelling of 51306511305 in words is "fifty-one billion, three hundred six million, five hundred eleven thousand, three hundred five".