531430531 has 2 divisors, whose sum is σ = 531430532. Its totient is φ = 531430530.

The previous prime is 531430517. The next prime is 531430547. The reversal of 531430531 is 135034135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531430531 is a prime.

It is a super-2 number, since 2×531430531² = 564836818557883922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531430496 and 531430505.

It is not a weakly prime, because it can be changed into another prime (531431531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265715265 + 265715266.

It is an arithmetic number, because the mean of its divisors is an integer number (265715266).

Almost surely, 2^531430531 is an apocalyptic number.

531430531 is a deficient number, since it is larger than the sum of its proper divisors (1).

531430531 is an equidigital number, since it uses as much as digits as its factorization.

531430531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 531430531 is about 23052.7770778273. Note that the first 3 decimals coincide. The cubic root of 531430531 is about 809.9946811620.

Adding to 531430531 its reverse (135034135), we get a palindrome (666464666).

The spelling of 531430531 in words is "five hundred thirty-one million, four hundred thirty thousand, five hundred thirty-one".