51365455291 has 2 divisors, whose sum is σ = 51365455292. Its totient is φ = 51365455290.

The previous prime is 51365455289. The next prime is 51365455319. The reversal of 51365455291 is 19255456315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51365455291 - 2¹ = 51365455289 is a prime.

Together with 51365455289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51365455201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25682727645 + 25682727646.

It is an arithmetic number, because the mean of its divisors is an integer number (25682727646).

Almost surely, 2^51365455291 is an apocalyptic number.

51365455291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51365455291 is an equidigital number, since it uses as much as digits as its factorization.

51365455291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810000, while the sum is 46.

The spelling of 51365455291 in words is "fifty-one billion, three hundred sixty-five million, four hundred fifty-five thousand, two hundred ninety-one".