531405253 has 2 divisors, whose sum is σ = 531405254. Its totient is φ = 531405252.

The previous prime is 531405239. The next prime is 531405257. The reversal of 531405253 is 352504135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394936129 + 136469124 = 19873^2 + 11682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531405253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531405257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265702626 + 265702627.

It is an arithmetic number, because the mean of its divisors is an integer number (265702627).

Almost surely, 2^531405253 is an apocalyptic number.

It is an amenable number.

531405253 is a deficient number, since it is larger than the sum of its proper divisors (1).

531405253 is an equidigital number, since it uses as much as digits as its factorization.

531405253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 531405253 is about 23052.2288076446. The cubic root of 531405253 is about 809.9818382353.

Adding to 531405253 its reverse (352504135), we get a palindrome (883909388).

The spelling of 531405253 in words is "five hundred thirty-one million, four hundred five thousand, two hundred fifty-three".