206191101 has 8 divisors (see below), whose sum is σ = 275028480. Its totient is φ = 137407232.

The previous prime is 206191061. The next prime is 206191123. The reversal of 206191101 is 101191602.

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

It is a cyclic number.

It is not a de Polignac number, because 206191101 - 2¹⁰ = 206190077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206191151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3300 + ... + 20573.

It is an arithmetic number, because the mean of its divisors is an integer number (34378560).

Almost surely, 2^206191101 is an apocalyptic number.

It is an amenable number.

206191101 is a deficient number, since it is larger than the sum of its proper divisors (68837379).

206191101 is a wasteful number, since it uses less digits than its factorization.

206191101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26755.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 206191101 is about 14359.3558699546. The cubic root of 206191101 is about 590.7766283188.

The spelling of 206191101 in words is "two hundred six million, one hundred ninety-one thousand, one hundred one".