505200387931 has 2 divisors, whose sum is σ = 505200387932. Its totient is φ = 505200387930.

The previous prime is 505200387889. The next prime is 505200387949. The reversal of 505200387931 is 139783002505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505200387931 - 2⁷ = 505200387803 is a prime.

It is a super-2 number, since 2×505200387931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505200385931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252600193965 + 252600193966.

It is an arithmetic number, because the mean of its divisors is an integer number (252600193966).

Almost surely, 2^505200387931 is an apocalyptic number.

505200387931 is a deficient number, since it is larger than the sum of its proper divisors (1).

505200387931 is an equidigital number, since it uses as much as digits as its factorization.

505200387931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 505200387931 in words is "five hundred five billion, two hundred million, three hundred eighty-seven thousand, nine hundred thirty-one".