206453855 has 16 divisors (see below), whose sum is σ = 252287904. Its totient is φ = 162155520.

The previous prime is 206453851. The next prime is 206453873. The reversal of 206453855 is 558354602.

It is not a de Polignac number, because 206453855 - 2² = 206453851 is a prime.

It is a super-2 number, since 2×206453855² = 85246388488722050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206453851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86792 + ... + 89138.

It is an arithmetic number, because the mean of its divisors is an integer number (15767994).

Almost surely, 2^206453855 is an apocalyptic number.

206453855 is a deficient number, since it is larger than the sum of its proper divisors (45834049).

206453855 is a wasteful number, since it uses less digits than its factorization.

206453855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 206453855 is about 14368.5021835959. The cubic root of 206453855 is about 591.0274684874.

The spelling of 206453855 in words is "two hundred six million, four hundred fifty-three thousand, eight hundred fifty-five".