205543054 has 4 divisors (see below), whose sum is σ = 308314584. Its totient is φ = 102771526.

The previous prime is 205543043. The next prime is 205543087. The reversal of 205543054 is 450345502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 450345502 = 2 ⋅225172751.

It is a congruent 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 as a sum of consecutive naturals, namely, 51385762 + ... + 51385765.

It is an arithmetic number, because the mean of its divisors is an integer number (77078646).

Almost surely, 2^205543054 is an apocalyptic number.

205543054 is a deficient number, since it is larger than the sum of its proper divisors (102771530).

205543054 is a wasteful number, since it uses less digits than its factorization.

205543054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102771529.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 205543054 is about 14336.7727888810. The cubic root of 205543054 is about 590.1570528948.

Adding to 205543054 its reverse (450345502), we get a palindrome (655888556).

The spelling of 205543054 in words is "two hundred five million, five hundred forty-three thousand, fifty-four".