204521992 has 8 divisors (see below), whose sum is σ = 383478750. Its totient is φ = 102260992.

The previous prime is 204521969. The next prime is 204522011. The reversal of 204521992 is 299125402.

It can be written as a sum of positive squares in only one way, i.e., 193933476 + 10588516 = 13926^2 + 3254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782617 + ... + 12782632.

Almost surely, 2^204521992 is an apocalyptic number.

It is an amenable number.

204521992 is a deficient number, since it is larger than the sum of its proper divisors (178956758).

204521992 is a wasteful number, since it uses less digits than its factorization.

204521992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25565255 (or 25565251 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 204521992 is about 14301.1185576514. The cubic root of 204521992 is about 589.1782028003.

The spelling of 204521992 in words is "two hundred four million, five hundred twenty-one thousand, nine hundred ninety-two".