531540433 has 2 divisors, whose sum is σ = 531540434. Its totient is φ = 531540432.

The previous prime is 531540407. The next prime is 531540469. The reversal of 531540433 is 334045135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526840209 + 4700224 = 22953^2 + 2168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531540433 is a prime.

It is not a weakly prime, because it can be changed into another prime (531540133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265770216 + 265770217.

It is an arithmetic number, because the mean of its divisors is an integer number (265770217).

Almost surely, 2^531540433 is an apocalyptic number.

It is an amenable number.

531540433 is a deficient number, since it is larger than the sum of its proper divisors (1).

531540433 is an equidigital number, since it uses as much as digits as its factorization.

531540433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 531540433 is about 23055.1606587332. The cubic root of 531540433 is about 810.0505140473.

Adding to 531540433 its reverse (334045135), we get a palindrome (865585568).

The spelling of 531540433 in words is "five hundred thirty-one million, five hundred forty thousand, four hundred thirty-three".