204731345 has 16 divisors (see below), whose sum is σ = 302373120. Its totient is φ = 129587904.

The previous prime is 204731341. The next prime is 204731363. The reversal of 204731345 is 543137402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 204731345 - 2² = 204731341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204731341) 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, 224525 + ... + 225434.

It is an arithmetic number, because the mean of its divisors is an integer number (18898320).

Almost surely, 2^204731345 is an apocalyptic number.

It is an amenable number.

204731345 is a deficient number, since it is larger than the sum of its proper divisors (97641775).

204731345 is a wasteful number, since it uses less digits than its factorization.

204731345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449984.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 204731345 is about 14308.4361479513. The cubic root of 204731345 is about 589.3791659672.

Adding to 204731345 its reverse (543137402), we get a palindrome (747868747).

The spelling of 204731345 in words is "two hundred four million, seven hundred thirty-one thousand, three hundred forty-five".