51315041345 has 4 divisors (see below), whose sum is σ = 61578049620. Its totient is φ = 41052033072.

The previous prime is 51315041341. The next prime is 51315041387. The reversal of 51315041345 is 54314051315.

51315041345 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 39501960001 + 11813081344 = 198751^2 + 108688^2 .

It is a cyclic number.

It is not a de Polignac number, because 51315041345 - 2² = 51315041341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51315041341) 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, 5131504130 + ... + 5131504139.

It is an arithmetic number, because the mean of its divisors is an integer number (15394512405).

Almost surely, 2^51315041345 is an apocalyptic number.

It is an amenable number.

51315041345 is a deficient number, since it is larger than the sum of its proper divisors (10263008275).

51315041345 is a wasteful number, since it uses less digits than its factorization.

51315041345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263008274.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 51315041345 in words is "fifty-one billion, three hundred fifteen million, forty-one thousand, three hundred forty-five".