531005641 has 2 divisors, whose sum is σ = 531005642. Its totient is φ = 531005640.

The previous prime is 531005633. The next prime is 531005647. The reversal of 531005641 is 146500135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499969600 + 31036041 = 22360^2 + 5571^2 .

It is a cyclic number.

It is not a de Polignac number, because 531005641 - 2³ = 531005633 is a prime.

It is not a weakly prime, because it can be changed into another prime (531005647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265502820 + 265502821.

It is an arithmetic number, because the mean of its divisors is an integer number (265502821).

Almost surely, 2^531005641 is an apocalyptic number.

It is an amenable number.

531005641 is a deficient number, since it is larger than the sum of its proper divisors (1).

531005641 is an equidigital number, since it uses as much as digits as its factorization.

531005641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 531005641 is about 23043.5596425552. The cubic root of 531005641 is about 809.7787542870.

Adding to 531005641 its reverse (146500135), we get a palindrome (677505776).

The spelling of 531005641 in words is "five hundred thirty-one million, five thousand, six hundred forty-one".