205126530 has 128 divisors (see below), whose sum is σ = 582819840. Its totient is φ = 45239040.

The previous prime is 205126529. The next prime is 205126531. The reversal of 205126530 is 35621502.

It is an interprime number because it is at equal distance from previous prime (205126529) and next prime (205126531).

It is a self number, because there is not a number n which added to its sum of digits gives 205126530.

It is not an unprimeable number, because it can be changed into a prime (205126531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 858151 + ... + 858389.

It is an arithmetic number, because the mean of its divisors is an integer number (4553280).

Almost surely, 2^205126530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205126530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291409920).

205126530 is an abundant number, since it is smaller than the sum of its proper divisors (377693310).

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

205126530 is a wasteful number, since it uses less digits than its factorization.

205126530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 205126530 is about 14322.2390009384. The cubic root of 205126530 is about 589.7581408374.

The spelling of 205126530 in words is "two hundred five million, one hundred twenty-six thousand, five hundred thirty".