191192231 has 4 divisors (see below), whose sum is σ = 201255000. Its totient is φ = 181129464.

The previous prime is 191192207. The next prime is 191192237. The reversal of 191192231 is 132291191.

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 191192231 - 2⁶ = 191192167 is a prime.

It is a super-2 number, since 2×191192231² = 73108938389514722, 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 = 191192194 and 191192203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191192237) 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, 5031356 + ... + 5031393.

It is an arithmetic number, because the mean of its divisors is an integer number (50313750).

Almost surely, 2^191192231 is an apocalyptic number.

191192231 is a deficient number, since it is larger than the sum of its proper divisors (10062769).

191192231 is a wasteful number, since it uses less digits than its factorization.

191192231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062768.

The product of its digits is 972, while the sum is 29.

The square root of 191192231 is about 13827.2278855886. The cubic root of 191192231 is about 576.0896599996.

The spelling of 191192231 in words is "one hundred ninety-one million, one hundred ninety-two thousand, two hundred thirty-one".