51216222260191 has 2 divisors, whose sum is σ = 51216222260192. Its totient is φ = 51216222260190.

The previous prime is 51216222260179. The next prime is 51216222260201. The reversal of 51216222260191 is 19106222261215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51216222260191 - 2⁹ = 51216222259679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51216222260101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25608111130095 + 25608111130096.

It is an arithmetic number, because the mean of its divisors is an integer number (25608111130096).

Almost surely, 2^{51216222260191} is an apocalyptic number.

51216222260191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51216222260191 is an equidigital number, since it uses as much as digits as its factorization.

51216222260191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 51216222260191 in words is "fifty-one trillion, two hundred sixteen billion, two hundred twenty-two million, two hundred sixty thousand, one hundred ninety-one".