205222660 has 48 divisors (see below), whose sum is σ = 447334272. Its totient is φ = 79027200.

The previous prime is 205222651. The next prime is 205222669. The reversal of 205222660 is 66222502.

It is an interprime number because it is at equal distance from previous prime (205222651) and next prime (205222669).

It is not an unprimeable number, because it can be changed into a prime (205222669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59380 + ... + 62740.

It is an arithmetic number, because the mean of its divisors is an integer number (9319464).

Almost surely, 2^205222660 is an apocalyptic number.

205222660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205222660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223667136).

205222660 is an abundant number, since it is smaller than the sum of its proper divisors (242111612).

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

205222660 is a wasteful number, since it uses less digits than its factorization.

205222660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 205222660 is about 14325.5945775385. The cubic root of 205222660 is about 589.8502540584.

The spelling of 205222660 in words is "two hundred five million, two hundred twenty-two thousand, six hundred sixty".