206880155 has 8 divisors (see below), whose sum is σ = 251753184. Its totient is φ = 163172800.

The previous prime is 206880103. The next prime is 206880161. The reversal of 206880155 is 551088602.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-206880155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291026 + ... + 291735.

It is an arithmetic number, because the mean of its divisors is an integer number (31469148).

Almost surely, 2^206880155 is an apocalyptic number.

206880155 is a deficient number, since it is larger than the sum of its proper divisors (44873029).

206880155 is an equidigital number, since it uses as much as digits as its factorization.

206880155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582837.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 206880155 is about 14383.3290652755. The cubic root of 206880155 is about 591.4339867551.

The spelling of 206880155 in words is "two hundred six million, eight hundred eighty thousand, one hundred fifty-five".