205454043 has 32 divisors (see below), whose sum is σ = 313082880. Its totient is φ = 133086240.

The previous prime is 205454021. The next prime is 205454057. The reversal of 205454043 is 340454502.

205454043 is a `hidden beast` number, since 205 + 454 + 0 + 4 + 3 = 666.

It is not a de Polignac number, because 205454043 - 2⁶ = 205453979 is a prime.

It is a super-2 number, since 2×205454043² = 84422727570091698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 205453998 and 205454016.

It is not an unprimeable number, because it can be changed into a prime (205454063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314305 + ... + 314957.

It is an arithmetic number, because the mean of its divisors is an integer number (9783840).

Almost surely, 2^205454043 is an apocalyptic number.

205454043 is a deficient number, since it is larger than the sum of its proper divisors (107628837).

205454043 is a wasteful number, since it uses less digits than its factorization.

205454043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 205454043 is about 14333.6681627558. The cubic root of 205454043 is about 590.0718508684.

The spelling of 205454043 in words is "two hundred five million, four hundred fifty-four thousand, forty-three".