51514799813 has 2 divisors, whose sum is σ = 51514799814. Its totient is φ = 51514799812.

The previous prime is 51514799783. The next prime is 51514799821. The reversal of 51514799813 is 31899741515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46987932289 + 4526867524 = 216767^2 + 67282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51514799813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51514799863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757399906 + 25757399907.

It is an arithmetic number, because the mean of its divisors is an integer number (25757399907).

Almost surely, 2^51514799813 is an apocalyptic number.

It is an amenable number.

51514799813 is a deficient number, since it is larger than the sum of its proper divisors (1).

51514799813 is an equidigital number, since it uses as much as digits as its factorization.

51514799813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 53.

The spelling of 51514799813 in words is "fifty-one billion, five hundred fourteen million, seven hundred ninety-nine thousand, eight hundred thirteen".