50581217191 has 2 divisors, whose sum is σ = 50581217192. Its totient is φ = 50581217190.

The previous prime is 50581217171. The next prime is 50581217201. The reversal of 50581217191 is 19171218505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50581217191 is a prime.

It is a super-2 number, since 2×50581217191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50581217161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25290608595 + 25290608596.

It is an arithmetic number, because the mean of its divisors is an integer number (25290608596).

Almost surely, 2^50581217191 is an apocalyptic number.

50581217191 is a deficient number, since it is larger than the sum of its proper divisors (1).

50581217191 is an equidigital number, since it uses as much as digits as its factorization.

50581217191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 40.

The spelling of 50581217191 in words is "fifty billion, five hundred eighty-one million, two hundred seventeen thousand, one hundred ninety-one".