191413231 has 4 divisors (see below), whose sum is σ = 194109264. Its totient is φ = 188717200.

The previous prime is 191413213. The next prime is 191413259. The reversal of 191413231 is 132314191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191413231 - 2¹⁵ = 191380463 is a prime.

It is a super-2 number, since 2×191413231² = 73278050003718722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191413196 and 191413205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191413331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347910 + ... + 1348051.

It is an arithmetic number, because the mean of its divisors is an integer number (48527316).

Almost surely, 2^191413231 is an apocalyptic number.

191413231 is a deficient number, since it is larger than the sum of its proper divisors (2696033).

191413231 is an equidigital number, since it uses as much as digits as its factorization.

191413231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696032.

The product of its digits is 648, while the sum is 25.

The square root of 191413231 is about 13835.2170564831. The cubic root of 191413231 is about 576.3115427798.

The spelling of 191413231 in words is "one hundred ninety-one million, four hundred thirteen thousand, two hundred thirty-one".