51309363373 has 4 divisors (see below), whose sum is σ = 51838325980. Its totient is φ = 50780400768.

The previous prime is 51309363349. The next prime is 51309363379. The reversal of 51309363373 is 37336390315.

51309363373 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.

It can be written as a sum of positive squares in 2 ways, for example, as 28222992009 + 23086371364 = 167997^2 + 151942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51309363373 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 (51309363379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264481158 + ... + 264481351.

It is an arithmetic number, because the mean of its divisors is an integer number (12959581495).

Almost surely, 2^51309363373 is an apocalyptic number.

It is an amenable number.

51309363373 is a deficient number, since it is larger than the sum of its proper divisors (528962607).

51309363373 is an equidigital number, since it uses as much as digits as its factorization.

51309363373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528962606.

The product of its (nonzero) digits is 459270, while the sum is 43.

The spelling of 51309363373 in words is "fifty-one billion, three hundred nine million, three hundred sixty-three thousand, three hundred seventy-three".