205041945 has 8 divisors (see below), whose sum is σ = 328067136. Its totient is φ = 109355696.

The previous prime is 205041899. The next prime is 205041959. The reversal of 205041945 is 549140502.

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

It is a cyclic number.

It is not a de Polignac number, because 205041945 - 2⁸ = 205041689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6834717 + ... + 6834746.

It is an arithmetic number, because the mean of its divisors is an integer number (41008392).

Almost surely, 2^205041945 is an apocalyptic number.

It is an amenable number.

205041945 is a deficient number, since it is larger than the sum of its proper divisors (123025191).

205041945 is a wasteful number, since it uses less digits than its factorization.

205041945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13669471.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 205041945 is about 14319.2857712946. The cubic root of 205041945 is about 589.6770664055.

The spelling of 205041945 in words is "two hundred five million, forty-one thousand, nine hundred forty-five".