205243411530 has 16 divisors (see below), whose sum is σ = 492584187744. Its totient is φ = 54731576400.

The previous prime is 205243411511. The next prime is 205243411537. The reversal of 205243411530 is 35114342502.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 6841447051 = 205243411530 / (2 + 0 + 5 + 2 + 4 + 3 + 4 + 1 + 1 + 5 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (205243411537) 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, 3420723496 + ... + 3420723555.

It is an arithmetic number, because the mean of its divisors is an integer number (30786511734).

Almost surely, 2^205243411530 is an apocalyptic number.

205243411530 is an abundant number, since it is smaller than the sum of its proper divisors (287340776214).

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

205243411530 is a wasteful number, since it uses less digits than its factorization.

205243411530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6841447061.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 205243411530 in words is "two hundred five billion, two hundred forty-three million, four hundred eleven thousand, five hundred thirty".