205122210 has 32 divisors (see below), whose sum is σ = 496901952. Its totient is φ = 54187200.

The previous prime is 205122193. The next prime is 205122251. The reversal of 205122210 is 12221502.

205122210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 205122210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28741 + ... + 35160.

It is an arithmetic number, because the mean of its divisors is an integer number (15528186).

Almost surely, 2^205122210 is an apocalyptic number.

205122210 is an abundant number, since it is smaller than the sum of its proper divisors (291779742).

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

205122210 is a wasteful number, since it uses less digits than its factorization.

205122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64018.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 205122210 is about 14322.0881857360. The cubic root of 205122210 is about 589.7540006724.

Adding to 205122210 its reverse (12221502), we get a palindrome (217343712).

It can be divided in two parts, 20512 and 2210, that added together give a palindrome (22722).

The spelling of 205122210 in words is "two hundred five million, one hundred twenty-two thousand, two hundred ten".