205424945 has 8 divisors (see below), whose sum is σ = 268920000. Its totient is φ = 149399920.

The previous prime is 205424929. The next prime is 205424953. The reversal of 205424945 is 549424502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205424945 - 2⁴ = 205424929 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867445 + ... + 1867554.

It is an arithmetic number, because the mean of its divisors is an integer number (33615000).

Almost surely, 2^205424945 is an apocalyptic number.

It is an amenable number.

205424945 is a deficient number, since it is larger than the sum of its proper divisors (63495055).

205424945 is a wasteful number, since it uses less digits than its factorization.

205424945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735015.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 205424945 is about 14332.6531040139. The cubic root of 205424945 is about 590.0439926978.

The spelling of 205424945 in words is "two hundred five million, four hundred twenty-four thousand, nine hundred forty-five".