205357530 has 80 divisors (see below), whose sum is σ = 575168544. Its totient is φ = 46922400.

The previous prime is 205357517. The next prime is 205357531. The reversal of 205357530 is 35753502.

205357530 is digitally balanced in base 2 and base 3, because in such bases 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 (30).

It is not an unprimeable number, because it can be changed into a prime (205357531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70605 + ... + 73455.

Almost surely, 2^205357530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205357530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287584272).

205357530 is an abundant number, since it is smaller than the sum of its proper divisors (369811014).

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

205357530 is an equidigital number, since it uses as much as digits as its factorization.

205357530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 205357530 is about 14330.3011133751. The cubic root of 205357530 is about 589.9794400573.

The spelling of 205357530 in words is "two hundred five million, three hundred fifty-seven thousand, five hundred thirty".