231364191 has 8 divisors (see below), whose sum is σ = 318436864. Its totient is φ = 149267160.

The previous prime is 231364187. The next prime is 231364207. The reversal of 231364191 is 191463132.

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

It is not a de Polignac number, because 231364191 - 2² = 231364187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231364141) 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, 1243801 + ... + 1243986.

It is an arithmetic number, because the mean of its divisors is an integer number (39804608).

Almost surely, 2^231364191 is an apocalyptic number.

231364191 is a deficient number, since it is larger than the sum of its proper divisors (87072673).

231364191 is a wasteful number, since it uses less digits than its factorization.

231364191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487821.

The product of its digits is 3888, while the sum is 30.

The square root of 231364191 is about 15210.6604393103. The cubic root of 231364191 is about 613.9015278142.

The spelling of 231364191 in words is "two hundred thirty-one million, three hundred sixty-four thousand, one hundred ninety-one".