538631227213 has 2 divisors, whose sum is σ = 538631227214. Its totient is φ = 538631227212.

The previous prime is 538631227181. The next prime is 538631227231. The reversal of 538631227213 is 312722136835.

Together with next prime (538631227231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500813813124 + 37817414089 = 707682^2 + 194467^2 .

It is a cyclic number.

It is not a de Polignac number, because 538631227213 - 2⁵ = 538631227181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538631227213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538631227513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269315613606 + 269315613607.

It is an arithmetic number, because the mean of its divisors is an integer number (269315613607).

Almost surely, 2^538631227213 is an apocalyptic number.

It is an amenable number.

538631227213 is a deficient number, since it is larger than the sum of its proper divisors (1).

538631227213 is an equidigital number, since it uses as much as digits as its factorization.

538631227213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The spelling of 538631227213 in words is "five hundred thirty-eight billion, six hundred thirty-one million, two hundred twenty-seven thousand, two hundred thirteen".