51360312215021 has 4 divisors (see below), whose sum is σ = 53593369267872. Its totient is φ = 49127255162172.

The previous prime is 51360312214999. The next prime is 51360312215027. The reversal of 51360312215021 is 12051221306315.

51360312215021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51360312215021 - 2²² = 51360308020717 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 (51360312215027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1116528526391 + ... + 1116528526436.

It is an arithmetic number, because the mean of its divisors is an integer number (13398342316968).

Almost surely, 2^{51360312215021} is an apocalyptic number.

It is an amenable number.

51360312215021 is a deficient number, since it is larger than the sum of its proper divisors (2233057052851).

51360312215021 is a wasteful number, since it uses less digits than its factorization.

51360312215021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233057052850.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 51360312215021 in words is "fifty-one trillion, three hundred sixty billion, three hundred twelve million, two hundred fifteen thousand, twenty-one".