538660231 has 2 divisors, whose sum is σ = 538660232. Its totient is φ = 538660230.

The previous prime is 538660217. The next prime is 538660237. The reversal of 538660231 is 132066835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 538660231 - 2¹³ = 538652039 is a prime.

It is a super-2 number, since 2×538660231² = 580309688921946722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538660237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269330115 + 269330116.

It is an arithmetic number, because the mean of its divisors is an integer number (269330116).

Almost surely, 2^538660231 is an apocalyptic number.

538660231 is a deficient number, since it is larger than the sum of its proper divisors (1).

538660231 is an equidigital number, since it uses as much as digits as its factorization.

538660231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 538660231 is about 23209.0549355203. The cubic root of 538660231 is about 813.6512656566.

The spelling of 538660231 in words is "five hundred thirty-eight million, six hundred sixty thousand, two hundred thirty-one".