204107881 has 4 divisors (see below), whose sum is σ = 209086164. Its totient is φ = 199129600.

The previous prime is 204107879. The next prime is 204107903. The reversal of 204107881 is 188701402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8555625 + 195552256 = 2925^2 + 13984^2 .

It is a cyclic number.

It is not a de Polignac number, because 204107881 - 2¹ = 204107879 is a prime.

It is a super-2 number, since 2×204107881² = 83320054172620322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204107801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2489080 + ... + 2489161.

It is an arithmetic number, because the mean of its divisors is an integer number (52271541).

Almost surely, 2^204107881 is an apocalyptic number.

It is an amenable number.

204107881 is a deficient number, since it is larger than the sum of its proper divisors (4978283).

204107881 is an equidigital number, since it uses as much as digits as its factorization.

204107881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978282.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 204107881 is about 14286.6329483192. The cubic root of 204107881 is about 588.7802830305.

The spelling of 204107881 in words is "two hundred four million, one hundred seven thousand, eight hundred eighty-one".