204563381 has 16 divisors (see below), whose sum is σ = 226000320. Its totient is φ = 183617280.

The previous prime is 204563371. The next prime is 204563407. The reversal of 204563381 is 183365402.

204563381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204563381 - 2¹⁰ = 204562357 is a prime.

It is a super-2 number, since 2×204563381² = 83692353692302322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204563321) 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, 515075 + ... + 515471.

It is an arithmetic number, because the mean of its divisors is an integer number (14125020).

Almost surely, 2^204563381 is an apocalyptic number.

It is an amenable number.

204563381 is a deficient number, since it is larger than the sum of its proper divisors (21436939).

204563381 is a wasteful number, since it uses less digits than its factorization.

204563381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 204563381 is about 14302.5655390912. The cubic root of 204563381 is about 589.2179440063.

The spelling of 204563381 in words is "two hundred four million, five hundred sixty-three thousand, three hundred eighty-one".