206155355 has 16 divisors (see below), whose sum is σ = 284891904. Its totient is φ = 140281440.

The previous prime is 206155349. The next prime is 206155393. The reversal of 206155355 is 553551602.

It is not a de Polignac number, because 206155355 - 2⁶ = 206155291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17897 + ... + 27066.

It is an arithmetic number, because the mean of its divisors is an integer number (17805744).

Almost surely, 2^206155355 is an apocalyptic number.

206155355 is a deficient number, since it is larger than the sum of its proper divisors (78736549).

206155355 is a wasteful number, since it uses less digits than its factorization.

206155355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45106.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 206155355 is about 14358.1111222890. Note that the first 4 decimals coincide. The cubic root of 206155355 is about 590.7424866549.

The spelling of 206155355 in words is "two hundred six million, one hundred fifty-five thousand, three hundred fifty-five".