508259981 has 2 divisors, whose sum is σ = 508259982. Its totient is φ = 508259980.

The previous prime is 508259971. The next prime is 508260017. The reversal of 508259981 is 189952805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259693225 + 248566756 = 16115^2 + 15766^2 .

It is a cyclic number.

It is not a de Polignac number, because 508259981 - 2¹⁰ = 508258957 is a prime.

It is a super-2 number, since 2×508259981² = 516656416572240722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (508259971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254129990 + 254129991.

It is an arithmetic number, because the mean of its divisors is an integer number (254129991).

Almost surely, 2^508259981 is an apocalyptic number.

It is an amenable number.

508259981 is a deficient number, since it is larger than the sum of its proper divisors (1).

508259981 is an equidigital number, since it uses as much as digits as its factorization.

508259981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 47.

The square root of 508259981 is about 22544.6219972746. The cubic root of 508259981 is about 798.0473110729.

It can be divided in two parts, 50825 and 9981, that added together give a palindrome (60806).

The spelling of 508259981 in words is "five hundred eight million, two hundred fifty-nine thousand, nine hundred eighty-one".