188500231 has 2 divisors, whose sum is σ = 188500232. Its totient is φ = 188500230.

The previous prime is 188500229. The next prime is 188500271. The reversal of 188500231 is 132005881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 188500231 - 2¹ = 188500229 is a prime.

It is a super-2 number, since 2×188500231² = 71064674174106722, which contains 22 as substring.

Together with 188500229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 188500231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188500271) 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, 94250115 + 94250116.

It is an arithmetic number, because the mean of its divisors is an integer number (94250116).

Almost surely, 2^188500231 is an apocalyptic number.

188500231 is a deficient number, since it is larger than the sum of its proper divisors (1).

188500231 is an equidigital number, since it uses as much as digits as its factorization.

188500231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 188500231 is about 13729.5386302672. The cubic root of 188500231 is about 573.3730756734.

The spelling of 188500231 in words is "one hundred eighty-eight million, five hundred thousand, two hundred thirty-one".