204249381 has 8 divisors (see below), whose sum is σ = 311237184. Its totient is φ = 116713920.

The previous prime is 204249377. The next prime is 204249389. The reversal of 204249381 is 183942402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204249381 - 2² = 204249377 is a prime.

It is a super-2 number, since 2×204249381² = 83435619277766322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204249389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4863060 + ... + 4863101.

It is an arithmetic number, because the mean of its divisors is an integer number (38904648).

Almost surely, 2^204249381 is an apocalyptic number.

204249381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204249381 is a deficient number, since it is larger than the sum of its proper divisors (106987803).

204249381 is an equidigital number, since it uses as much as digits as its factorization.

204249381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9726171.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 204249381 is about 14291.5842718713. The cubic root of 204249381 is about 588.9163110380.

The spelling of 204249381 in words is "two hundred four million, two hundred forty-nine thousand, three hundred eighty-one".