206156157 has 8 divisors (see below), whose sum is σ = 284353440. Its totient is φ = 132698160.

The previous prime is 206156057. The next prime is 206156173. The reversal of 206156157 is 751651602.

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

It is not a de Polignac number, because 206156157 - 2¹⁹ = 205631869 is a prime.

It is a super-3 number, since 3×206156157³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206156177) 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, 1184719 + ... + 1184892.

It is an arithmetic number, because the mean of its divisors is an integer number (35544180).

Almost surely, 2^206156157 is an apocalyptic number.

It is an amenable number.

206156157 is a deficient number, since it is larger than the sum of its proper divisors (78197283).

206156157 is a wasteful number, since it uses less digits than its factorization.

206156157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369643.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 206156157 is about 14358.1390507266. The cubic root of 206156157 is about 590.7432527032.

The spelling of 206156157 in words is "two hundred six million, one hundred fifty-six thousand, one hundred fifty-seven".