50972220917 has 2 divisors, whose sum is σ = 50972220918. Its totient is φ = 50972220916.

The previous prime is 50972220883. The next prime is 50972220961. The reversal of 50972220917 is 71902227905.

It is an a-pointer prime, because the next prime (50972220961) can be obtained adding 50972220917 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46636130116 + 4336090801 = 215954^2 + 65849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50972220917 is a prime.

It is a super-2 number, since 2×50972220917² (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 (50972220517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25486110458 + 25486110459.

It is an arithmetic number, because the mean of its divisors is an integer number (25486110459).

Almost surely, 2^50972220917 is an apocalyptic number.

It is an amenable number.

50972220917 is a deficient number, since it is larger than the sum of its proper divisors (1).

50972220917 is an equidigital number, since it uses as much as digits as its factorization.

50972220917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 50972220917 in words is "fifty billion, nine hundred seventy-two million, two hundred twenty thousand, nine hundred seventeen".