531323449 has 2 divisors, whose sum is σ = 531323450. Its totient is φ = 531323448.

The previous prime is 531323431. The next prime is 531323453. The reversal of 531323449 is 944323135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522579600 + 8743849 = 22860^2 + 2957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531323449 is a prime.

It is not a weakly prime, because it can be changed into another prime (531327449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265661724 + 265661725.

It is an arithmetic number, because the mean of its divisors is an integer number (265661725).

Almost surely, 2^531323449 is an apocalyptic number.

It is an amenable number.

531323449 is a deficient number, since it is larger than the sum of its proper divisors (1).

531323449 is an equidigital number, since it uses as much as digits as its factorization.

531323449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 531323449 is about 23050.4544206833. The cubic root of 531323449 is about 809.9402735009.

The spelling of 531323449 in words is "five hundred thirty-one million, three hundred twenty-three thousand, four hundred forty-nine".