188971231 has 8 divisors (see below), whose sum is σ = 191903904. Its totient is φ = 186048000.

The previous prime is 188971219. The next prime is 188971241. The reversal of 188971231 is 132179881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188971231 - 2⁵ = 188971199 is a prime.

It is a super-2 number, since 2×188971231² = 71420252291310722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188971241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45231 + ... + 49231.

It is an arithmetic number, because the mean of its divisors is an integer number (23987988).

Almost surely, 2^188971231 is an apocalyptic number.

188971231 is a deficient number, since it is larger than the sum of its proper divisors (2932673).

188971231 is an equidigital number, since it uses as much as digits as its factorization.

188971231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721.

The product of its digits is 24192, while the sum is 40.

The square root of 188971231 is about 13746.6807266336. The cubic root of 188971231 is about 573.8502353027.

The spelling of 188971231 in words is "one hundred eighty-eight million, nine hundred seventy-one thousand, two hundred thirty-one".