205897825 has 36 divisors (see below), whose sum is σ = 302411200. Its totient is φ = 136221120.

The previous prime is 205897823. The next prime is 205897831. The reversal of 205897825 is 528798502.

It is not a de Polignac number, because 205897825 - 2¹ = 205897823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205897823) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 146476 + ... + 147874.

Almost surely, 2^205897825 is an apocalyptic number.

205897825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205897825 is a deficient number, since it is larger than the sum of its proper divisors (96513375).

205897825 is a wasteful number, since it uses less digits than its factorization.

205897825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 205897825 is about 14349.1402181455. The cubic root of 205897825 is about 590.4963982857.

The spelling of 205897825 in words is "two hundred five million, eight hundred ninety-seven thousand, eight hundred twenty-five".