538631227231 has 2 divisors, whose sum is σ = 538631227232. Its totient is φ = 538631227230.

The previous prime is 538631227213. The next prime is 538631227307. The reversal of 538631227231 is 132722136835.

Together with previous prime (538631227213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 538631227231 - 2²⁷ = 538497009503 is a prime.

It is a super-2 number, since 2×538631227231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538631221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269315613615 + 269315613616.

It is an arithmetic number, because the mean of its divisors is an integer number (269315613616).

Almost surely, 2^538631227231 is an apocalyptic number.

538631227231 is a deficient number, since it is larger than the sum of its proper divisors (1).

538631227231 is an equidigital number, since it uses as much as digits as its factorization.

538631227231 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 538631227231 in words is "five hundred thirty-eight billion, six hundred thirty-one million, two hundred twenty-seven thousand, two hundred thirty-one".