205512730 has 16 divisors (see below), whose sum is σ = 370153800. Its totient is φ = 82153792.

The previous prime is 205512701. The next prime is 205512767. The reversal of 205512730 is 37215502.

205512730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 124746561 + 80766169 = 11169^2 + 8987^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205512695 and 205512704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13296 + ... + 24244.

Almost surely, 2^205512730 is an apocalyptic number.

205512730 is a deficient number, since it is larger than the sum of its proper divisors (164641070).

205512730 is a wasteful number, since it uses less digits than its factorization.

205512730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12833.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 205512730 is about 14335.7151896932. The cubic root of 205512730 is about 590.1280292875.

The spelling of 205512730 in words is "two hundred five million, five hundred twelve thousand, seven hundred thirty".