191155214 has 8 divisors (see below), whose sum is σ = 288450288. Its totient is φ = 95005120.

The previous prime is 191155213. The next prime is 191155291. The reversal of 191155214 is 412551191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191155213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285827 + ... + 286494.

It is an arithmetic number, because the mean of its divisors is an integer number (36056286).

Almost surely, 2^191155214 is an apocalyptic number.

191155214 is a deficient number, since it is larger than the sum of its proper divisors (97295074).

191155214 is a wasteful number, since it uses less digits than its factorization.

191155214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572490.

The product of its digits is 1800, while the sum is 29.

The square root of 191155214 is about 13825.8892661557. The cubic root of 191155214 is about 576.0524784201.

The spelling of 191155214 in words is "one hundred ninety-one million, one hundred fifty-five thousand, two hundred fourteen".