50120311531 has 2 divisors, whose sum is σ = 50120311532. Its totient is φ = 50120311530.

The previous prime is 50120311513. The next prime is 50120311547. The reversal of 50120311531 is 13511302105.

Together with previous prime (50120311513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50120311531 - 2²¹ = 50118214379 is a prime.

It is a super-2 number, since 2×50120311531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50120318531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25060155765 + 25060155766.

It is an arithmetic number, because the mean of its divisors is an integer number (25060155766).

Almost surely, 2^50120311531 is an apocalyptic number.

50120311531 is a deficient number, since it is larger than the sum of its proper divisors (1).

50120311531 is an equidigital number, since it uses as much as digits as its factorization.

50120311531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 50120311531 its reverse (13511302105), we get a palindrome (63631613636).

The spelling of 50120311531 in words is "fifty billion, one hundred twenty million, three hundred eleven thousand, five hundred thirty-one".