205440542 has 16 divisors (see below), whose sum is σ = 314692992. Its totient is φ = 100563840.

The previous prime is 205440533. The next prime is 205440551. The reversal of 205440542 is 245044502.

It is an interprime number because it is at equal distance from previous prime (205440533) and next prime (205440551).

It is a congruent number.

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, 14867 + ... + 25137.

It is an arithmetic number, because the mean of its divisors is an integer number (19668312).

Almost surely, 2^205440542 is an apocalyptic number.

205440542 is a deficient number, since it is larger than the sum of its proper divisors (109252450).

205440542 is a wasteful number, since it uses less digits than its factorization.

205440542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 205440542 is about 14333.1972009039. The cubic root of 205440542 is about 590.0589254563.

The spelling of 205440542 in words is "two hundred five million, four hundred forty thousand, five hundred forty-two".