205381449 has 48 divisors (see below), whose sum is σ = 371198464. Its totient is φ = 106531200.

The previous prime is 205381433. The next prime is 205381481. The reversal of 205381449 is 944183502.

205381449 is a `hidden beast` number, since 205 + 3 + 8 + 1 + 449 = 666.

It is not a de Polignac number, because 205381449 - 2⁴ = 205381433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205381409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47904 + ... + 52014.

Almost surely, 2^205381449 is an apocalyptic number.

It is an amenable number.

205381449 is a deficient number, since it is larger than the sum of its proper divisors (165817015).

205381449 is a wasteful number, since it uses less digits than its factorization.

205381449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 205381449 is about 14331.1356493475. The cubic root of 205381449 is about 590.0023451022.

The spelling of 205381449 in words is "two hundred five million, three hundred eighty-one thousand, four hundred forty-nine".