531221253524443 has 2 divisors, whose sum is σ = 531221253524444. Its totient is φ = 531221253524442.

The previous prime is 531221253524431. The next prime is 531221253524453. The reversal of 531221253524443 is 344425352122135.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531221253524443 is a prime.

It is a super-4 number, since 4×531221253524443⁴ (a number of 60 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531221253524393 and 531221253524402.

It is not a weakly prime, because it can be changed into another prime (531221253524453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265610626762221 + 265610626762222.

It is an arithmetic number, because the mean of its divisors is an integer number (265610626762222).

Almost surely, 2^{531221253524443} is an apocalyptic number.

531221253524443 is a deficient number, since it is larger than the sum of its proper divisors (1).

531221253524443 is an equidigital number, since it uses as much as digits as its factorization.

531221253524443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456000, while the sum is 46.

The spelling of 531221253524443 in words is "five hundred thirty-one trillion, two hundred twenty-one billion, two hundred fifty-three million, five hundred twenty-four thousand, four hundred forty-three".