531123413 has 2 divisors, whose sum is σ = 531123414. Its totient is φ = 531123412.

The previous prime is 531123409. The next prime is 531123421. The reversal of 531123413 is 314321135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 460445764 + 70677649 = 21458^2 + 8407^2 .

It is a cyclic number.

It is not a de Polignac number, because 531123413 - 2² = 531123409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531123433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265561706 + 265561707.

It is an arithmetic number, because the mean of its divisors is an integer number (265561707).

Almost surely, 2^531123413 is an apocalyptic number.

It is an amenable number.

531123413 is a deficient number, since it is larger than the sum of its proper divisors (1).

531123413 is an equidigital number, since it uses as much as digits as its factorization.

531123413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 531123413 is about 23046.1149220427. The cubic root of 531123413 is about 809.8386169365.

Adding to 531123413 its reverse (314321135), we get a palindrome (845444548).

The spelling of 531123413 in words is "five hundred thirty-one million, one hundred twenty-three thousand, four hundred thirteen".