205211433 has 16 divisors (see below), whose sum is σ = 313066880. Its totient is φ = 117127296.

The previous prime is 205211431. The next prime is 205211449. The reversal of 205211433 is 334112502.

205211433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205211433 - 2¹ = 205211431 is a prime.

It is a super-2 number, since 2×205211433² = 84223464467826978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (205211431) 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, 14463 + ... + 24891.

It is an arithmetic number, because the mean of its divisors is an integer number (19566680).

Almost surely, 2^205211433 is an apocalyptic number.

It is an amenable number.

205211433 is a deficient number, since it is larger than the sum of its proper divisors (107855447).

205211433 is a wasteful number, since it uses less digits than its factorization.

205211433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 205211433 is about 14325.2027210787. The cubic root of 205211433 is about 589.8394976608.

Adding to 205211433 its reverse (334112502), we get a palindrome (539323935).

The spelling of 205211433 in words is "two hundred five million, two hundred eleven thousand, four hundred thirty-three".