206408157 has 12 divisors (see below), whose sum is σ = 279054144. Its totient is φ = 135709920.

The previous prime is 206408123. The next prime is 206408171. The reversal of 206408157 is 751804602.

It is not a de Polignac number, because 206408157 - 2¹² = 206404061 is a prime.

It is a super-2 number, since 2×206408157² = 85208654552273298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206408107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9532 + ... + 22442.

It is an arithmetic number, because the mean of its divisors is an integer number (23254512).

Almost surely, 2^206408157 is an apocalyptic number.

It is an amenable number.

206408157 is a deficient number, since it is larger than the sum of its proper divisors (72645987).

206408157 is an equidigital number, since it uses as much as digits as its factorization.

206408157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13060 (or 12987 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 206408157 is about 14366.9118811246. The cubic root of 206408157 is about 590.9838578280.

The spelling of 206408157 in words is "two hundred six million, four hundred eight thousand, one hundred fifty-seven".