204344781 has 4 divisors (see below), whose sum is σ = 272459712. Its totient is φ = 136229852.

The previous prime is 204344773. The next prime is 204344783. The reversal of 204344781 is 187443402.

204344781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204344781 - 2³ = 204344773 is a prime.

It is a super-2 number, since 2×204344781² = 83513579043875922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204344783) 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, 34057461 + ... + 34057466.

It is an arithmetic number, because the mean of its divisors is an integer number (68114928).

Almost surely, 2^204344781 is an apocalyptic number.

It is an amenable number.

204344781 is a deficient number, since it is larger than the sum of its proper divisors (68114931).

204344781 is an equidigital number, since it uses as much as digits as its factorization.

204344781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68114930.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 204344781 is about 14294.9215108024. The cubic root of 204344781 is about 589.0079863401.

The spelling of 204344781 in words is "two hundred four million, three hundred forty-four thousand, seven hundred eighty-one".