205220706 has 16 divisors (see below), whose sum is σ = 419174784. Its totient is φ = 66951344.

The previous prime is 205220699. The next prime is 205220707. The reversal of 205220706 is 607022502.

It is a super-2 number, since 2×205220706² = 84231076342276872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205220707) 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, 363585 + ... + 364148.

It is an arithmetic number, because the mean of its divisors is an integer number (26198424).

Almost surely, 2^205220706 is an apocalyptic number.

205220706 is an abundant number, since it is smaller than the sum of its proper divisors (213954078).

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

205220706 is a wasteful number, since it uses less digits than its factorization.

205220706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727785.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 205220706 is about 14325.5263777636. The cubic root of 205220706 is about 589.8483819924.

The spelling of 205220706 in words is "two hundred five million, two hundred twenty thousand, seven hundred six".