50515151081 has 2 divisors, whose sum is σ = 50515151082. Its totient is φ = 50515151080.

The previous prime is 50515151053. The next prime is 50515151123. The reversal of 50515151081 is 18015151505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50514810025 + 341056 = 224755^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 50515151081 - 2⁶ = 50515151017 is a prime.

It is a super-2 number, since 2×50515151081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50515157081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25257575540 + 25257575541.

It is an arithmetic number, because the mean of its divisors is an integer number (25257575541).

Almost surely, 2^50515151081 is an apocalyptic number.

It is an amenable number.

50515151081 is a deficient number, since it is larger than the sum of its proper divisors (1).

50515151081 is an equidigital number, since it uses as much as digits as its factorization.

50515151081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 32.

The spelling of 50515151081 in words is "fifty billion, five hundred fifteen million, one hundred fifty-one thousand, eighty-one".