531440453 has 2 divisors, whose sum is σ = 531440454. Its totient is φ = 531440452.

The previous prime is 531440363. The next prime is 531440491. The reversal of 531440453 is 354044135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458730724 + 72709729 = 21418^2 + 8527^2 .

It is a cyclic number.

It is not a de Polignac number, because 531440453 - 2¹² = 531436357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531440353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265720226 + 265720227.

It is an arithmetic number, because the mean of its divisors is an integer number (265720227).

Almost surely, 2^531440453 is an apocalyptic number.

It is an amenable number.

531440453 is a deficient number, since it is larger than the sum of its proper divisors (1).

531440453 is an equidigital number, since it uses as much as digits as its factorization.

531440453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 531440453 is about 23052.9922786609. The cubic root of 531440453 is about 809.9997220951. Note that the first 3 decimals are identical.

Adding to 531440453 its reverse (354044135), we get a palindrome (885484588).

The spelling of 531440453 in words is "five hundred thirty-one million, four hundred forty thousand, four hundred fifty-three".