531540481 has 2 divisors, whose sum is σ = 531540482. Its totient is φ = 531540480.

The previous prime is 531540469. The next prime is 531540487. The reversal of 531540481 is 184045135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445885456 + 85655025 = 21116^2 + 9255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531540481 is a prime.

It is a super-2 number, since 2×531540481² = 565070565883422722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531540487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265770240 + 265770241.

It is an arithmetic number, because the mean of its divisors is an integer number (265770241).

Almost surely, 2^531540481 is an apocalyptic number.

It is an amenable number.

531540481 is a deficient number, since it is larger than the sum of its proper divisors (1).

531540481 is an equidigital number, since it uses as much as digits as its factorization.

531540481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 531540481 is about 23055.1616997149. The cubic root of 531540481 is about 810.0505384308.

It can be divided in two parts, 5315 and 40481, that added together give a square (45796 = 214²).

The spelling of 531540481 in words is "five hundred thirty-one million, five hundred forty thousand, four hundred eighty-one".