531430660503221 has 2 divisors, whose sum is σ = 531430660503222. Its totient is φ = 531430660503220.

The previous prime is 531430660503173. The next prime is 531430660503229. The reversal of 531430660503221 is 122305066034135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385463523900625 + 145967136602596 = 19633225^2 + 12081686^2 .

It is a cyclic number.

It is not a de Polignac number, because 531430660503221 - 2³⁴ = 531413480634037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531430660503229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265715330251610 + 265715330251611.

It is an arithmetic number, because the mean of its divisors is an integer number (265715330251611).

Almost surely, 2^{531430660503221} is an apocalyptic number.

It is an amenable number.

531430660503221 is a deficient number, since it is larger than the sum of its proper divisors (1).

531430660503221 is an equidigital number, since it uses as much as digits as its factorization.

531430660503221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 531430660503221 in words is "five hundred thirty-one trillion, four hundred thirty billion, six hundred sixty million, five hundred three thousand, two hundred twenty-one".