204787881 has 12 divisors (see below), whose sum is σ = 298135552. Its totient is φ = 135449496.

The previous prime is 204787841. The next prime is 204787901. The reversal of 204787881 is 188787402.

It is not a de Polignac number, because 204787881 - 2¹⁵ = 204755113 is a prime.

It is a super-2 number, since 2×204787881² = 83876152408940322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204787811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88441 + ... + 90726.

Almost surely, 2^204787881 is an apocalyptic number.

It is an amenable number.

204787881 is a deficient number, since it is larger than the sum of its proper divisors (93347671).

204787881 is a wasteful number, since it uses less digits than its factorization.

204787881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179300 (or 179297 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 204787881 is about 14310.4116292998. The cubic root of 204787881 is about 589.4334127881.

The spelling of 204787881 in words is "two hundred four million, seven hundred eighty-seven thousand, eight hundred eighty-one".