205432011 has 16 divisors (see below), whose sum is σ = 305028000. Its totient is φ = 136646784.

The previous prime is 205431991. The next prime is 205432013. The reversal of 205432011 is 110234502.

It is not a de Polignac number, because 205432011 - 2⁵ = 205431979 is a prime.

It is a super-2 number, since 2×205432011² = 84404622287008242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205432013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4015 + ... + 20663.

It is an arithmetic number, because the mean of its divisors is an integer number (19064250).

Almost surely, 2^205432011 is an apocalyptic number.

205432011 is a deficient number, since it is larger than the sum of its proper divisors (99595989).

205432011 is a wasteful number, since it uses less digits than its factorization.

205432011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17115 (or 17109 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 205432011 is about 14332.8996019647. The cubic root of 205432011 is about 590.0507578662.

Adding to 205432011 its reverse (110234502), we get a palindrome (315666513).

The spelling of 205432011 in words is "two hundred five million, four hundred thirty-two thousand, eleven".