206156231 has 8 divisors (see below), whose sum is σ = 213915264. Its totient is φ = 198466560.

The previous prime is 206156227. The next prime is 206156243. The reversal of 206156231 is 132651602.

206156231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 206156231 - 2² = 206156227 is a prime.

It is a super-2 number, since 2×206156231² = 85000783160250722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206156231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206156221) 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, 11246 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (26739408).

Almost surely, 2^206156231 is an apocalyptic number.

206156231 is a deficient number, since it is larger than the sum of its proper divisors (7759033).

206156231 is a wasteful number, since it uses less digits than its factorization.

206156231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34681.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 206156231 is about 14358.1416276620. The cubic root of 206156231 is about 590.7433233858.

The spelling of 206156231 in words is "two hundred six million, one hundred fifty-six thousand, two hundred thirty-one".