188131 has 4 divisors (see below), whose sum is σ = 189000. Its totient is φ = 187264.

The previous prime is 188107. The next prime is 188137. The reversal of 188131 is 131881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 131881 = 43 ⋅3067.

It is a cyclic number.

It is not a de Polignac number, because 188131 - 2¹³ = 179939 is a prime.

It is a super-2 number, since 2×188131² = 70786546322, which contains 22 as substring.

It is a Duffinian number.

188131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (188137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2¹⁸⁸¹³¹ is an apocalyptic number.

188131 is a deficient number, since it is larger than the sum of its proper divisors (869).

188131 is an equidigital number, since it uses as much as digits as its factorization.

188131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868.

The product of its digits is 192, while the sum is 22.

The square root of 188131 is about 433.7407059523. The cubic root of 188131 is about 57.2998459874.

It can be divided in two parts, 1881 and 31, that multiplied together give a triangular number (58311 = T₃₄₁).

The spelling of 188131 in words is "one hundred eighty-eight thousand, one hundred thirty-one".