205220434 has 16 divisors (see below), whose sum is σ = 320060160. Its totient is φ = 98581680.

The previous prime is 205220371. The next prime is 205220437. The reversal of 205220434 is 434022502.

205220434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205220434² = 84230853062296712, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (205220437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289 + ... + 20524.

It is an arithmetic number, because the mean of its divisors is an integer number (20003760).

Almost surely, 2^205220434 is an apocalyptic number.

205220434 is a deficient number, since it is larger than the sum of its proper divisors (114839726).

205220434 is a wasteful number, since it uses less digits than its factorization.

205220434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23985.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 205220434 is about 14325.5168842175. The cubic root of 205220434 is about 589.8481213968.

Adding to 205220434 its reverse (434022502), we get a palindrome (639242936).

The spelling of 205220434 in words is "two hundred five million, two hundred twenty thousand, four hundred thirty-four".