205551042 has 32 divisors (see below), whose sum is σ = 418813632. Its totient is φ = 67239744.

The previous prime is 205551037. The next prime is 205551067. The reversal of 205551042 is 240155502.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126628 + ... + 128240.

It is an arithmetic number, because the mean of its divisors is an integer number (13087926).

Almost surely, 2^205551042 is an apocalyptic number.

205551042 is an abundant number, since it is smaller than the sum of its proper divisors (213262590).

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

205551042 is a wasteful number, since it uses less digits than its factorization.

205551042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205551042 is about 14337.0513704876. The cubic root of 205551042 is about 590.1646978680.

The spelling of 205551042 in words is "two hundred five million, five hundred fifty-one thousand, forty-two".