131223199 has 4 divisors (see below), whose sum is σ = 131264280. Its totient is φ = 131182120.

The previous prime is 131223193. The next prime is 131223227. The reversal of 131223199 is 991322131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991322131 = 19 ⋅52174849.

It is a cyclic number.

It is not a de Polignac number, because 131223199 - 2⁵ = 131223167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131223199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223193) 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 3 ways as a sum of consecutive naturals, for example, 15304 + ... + 22285.

It is an arithmetic number, because the mean of its divisors is an integer number (32816070).

Almost surely, 2^131223199 is an apocalyptic number.

131223199 is a deficient number, since it is larger than the sum of its proper divisors (41081).

131223199 is an equidigital number, since it uses as much as digits as its factorization.

131223199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41080.

The product of its digits is 2916, while the sum is 31.

The square root of 131223199 is about 11455.2694861361. The cubic root of 131223199 is about 508.1635850193.

The spelling of 131223199 in words is "one hundred thirty-one million, two hundred twenty-three thousand, one hundred ninety-nine".