206551378 has 16 divisors (see below), whose sum is σ = 341794080. Its totient is φ = 92831200.

The previous prime is 206551349. The next prime is 206551379. The reversal of 206551378 is 873155602.

206551378 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (206551379) 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, 50788 + ... + 54703.

It is an arithmetic number, because the mean of its divisors is an integer number (21362130).

Almost surely, 2^206551378 is an apocalyptic number.

206551378 is a deficient number, since it is larger than the sum of its proper divisors (135242702).

206551378 is a wasteful number, since it uses less digits than its factorization.

206551378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105593.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 206551378 is about 14371.8954212727. The cubic root of 206551378 is about 591.1205154276.

The spelling of 206551378 in words is "two hundred six million, five hundred fifty-one thousand, three hundred seventy-eight".