205616133 has 6 divisors (see below), whose sum is σ = 297001094. Its totient is φ = 137077416.

The previous prime is 205616129. The next prime is 205616143. The reversal of 205616133 is 331616502.

It can be written as a sum of positive squares in only one way, i.e., 205549569 + 66564 = 14337^2 + 258^2 .

It is not a de Polignac number, because 205616133 - 2² = 205616129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205616097 and 205616106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205616143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11423110 + ... + 11423127.

Almost surely, 2^205616133 is an apocalyptic number.

It is an amenable number.

205616133 is a deficient number, since it is larger than the sum of its proper divisors (91384961).

205616133 is a wasteful number, since it uses less digits than its factorization.

205616133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22846243 (or 22846240 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 205616133 is about 14339.3212182446. The cubic root of 205616133 is about 590.2269862999.

The spelling of 205616133 in words is "two hundred five million, six hundred sixteen thousand, one hundred thirty-three".