51381504713233 has 2 divisors, whose sum is σ = 51381504713234. Its totient is φ = 51381504713232.

The previous prime is 51381504713171. The next prime is 51381504713249. The reversal of 51381504713233 is 33231740518315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25945046202384 + 25436458510849 = 5093628^2 + 5043457^2 .

It is a cyclic number.

It is not a de Polignac number, because 51381504713233 - 2⁴⁵ = 16197132624401 is a prime.

It is not a weakly prime, because it can be changed into another prime (51381504713263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690752356616 + 25690752356617.

It is an arithmetic number, because the mean of its divisors is an integer number (25690752356617).

Almost surely, 2^{51381504713233} is an apocalyptic number.

It is an amenable number.

51381504713233 is a deficient number, since it is larger than the sum of its proper divisors (1).

51381504713233 is an equidigital number, since it uses as much as digits as its factorization.

51381504713233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 51381504713233 in words is "fifty-one trillion, three hundred eighty-one billion, five hundred four million, seven hundred thirteen thousand, two hundred thirty-three".