204261505 has 16 divisors (see below), whose sum is σ = 292310784. Its totient is φ = 133974720.

The previous prime is 204261469. The next prime is 204261517. The reversal of 204261505 is 505162402.

It is not a de Polignac number, because 204261505 - 2⁷ = 204261377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204261505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126066 + ... + 127675.

It is an arithmetic number, because the mean of its divisors is an integer number (18269424).

Almost surely, 2^204261505 is an apocalyptic number.

It is an amenable number.

204261505 is a deficient number, since it is larger than the sum of its proper divisors (88049279).

204261505 is a wasteful number, since it uses less digits than its factorization.

204261505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253776.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 204261505 is about 14292.0084312877. The cubic root of 204261505 is about 588.9279632644.

The spelling of 204261505 in words is "two hundred four million, two hundred sixty-one thousand, five hundred five".