206234881 has 4 divisors (see below), whose sum is σ = 207135700. Its totient is φ = 205334064.

The previous prime is 206234843. The next prime is 206234933. The reversal of 206234881 is 188432602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188432602 = 2 ⋅94216301.

It can be written as a sum of positive squares in 2 ways, for example, as 193210000 + 13024881 = 13900^2 + 3609^2 .

It is a cyclic number.

It is not a de Polignac number, because 206234881 - 2⁷ = 206234753 is a prime.

It is a super-2 number, since 2×206234881² = 85065652282168322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206234801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450066 + ... + 450523.

It is an arithmetic number, because the mean of its divisors is an integer number (51783925).

Almost surely, 2^206234881 is an apocalyptic number.

It is an amenable number.

206234881 is a deficient number, since it is larger than the sum of its proper divisors (900819).

206234881 is an equidigital number, since it uses as much as digits as its factorization.

206234881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900818.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 206234881 is about 14360.8802306822. The cubic root of 206234881 is about 590.8184380289.

The spelling of 206234881 in words is "two hundred six million, two hundred thirty-four thousand, eight hundred eighty-one".