205745442 has 32 divisors (see below), whose sum is σ = 490724352. Its totient is φ = 56228304.

The previous prime is 205745431. The next prime is 205745447. The reversal of 205745442 is 244547502.

It is not an unprimeable number, because it can be changed into a prime (205745447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105528 + ... + 107459.

It is an arithmetic number, because the mean of its divisors is an integer number (15335136).

Almost surely, 2^205745442 is an apocalyptic number.

205745442 is an abundant number, since it is smaller than the sum of its proper divisors (284978910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205745442 is a wasteful number, since it uses less digits than its factorization.

205745442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213022.

The product of its (nonzero) digits is 44800, while the sum is 33.

The square root of 205745442 is about 14343.8294050090. The cubic root of 205745442 is about 590.3506887653.

The spelling of 205745442 in words is "two hundred five million, seven hundred forty-five thousand, four hundred forty-two".