531260581 has 2 divisors, whose sum is σ = 531260582. Its totient is φ = 531260580.

The previous prime is 531260563. The next prime is 531260623. The reversal of 531260581 is 185062135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 121198081 = 20250^2 + 11009^2 .

It is a cyclic number.

It is not a de Polignac number, because 531260581 - 2⁷ = 531260453 is a prime.

It is a super-2 number, since 2×531260581² = 564475609848915122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531269581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265630290 + 265630291.

It is an arithmetic number, because the mean of its divisors is an integer number (265630291).

Almost surely, 2^531260581 is an apocalyptic number.

It is an amenable number.

531260581 is a deficient number, since it is larger than the sum of its proper divisors (1).

531260581 is an equidigital number, since it uses as much as digits as its factorization.

531260581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 531260581 is about 23049.0906762067. The cubic root of 531260581 is about 809.9083272770.

The spelling of 531260581 in words is "five hundred thirty-one million, two hundred sixty thousand, five hundred eighty-one".