206154133 has 2 divisors, whose sum is σ = 206154134. Its totient is φ = 206154132.

The previous prime is 206154119. The next prime is 206154181. The reversal of 206154133 is 331451602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200307409 + 5846724 = 14153^2 + 2418^2 .

It is a cyclic number.

It is not a de Polignac number, because 206154133 - 2⁵ = 206154101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206154098 and 206154107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206154103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103077066 + 103077067.

It is an arithmetic number, because the mean of its divisors is an integer number (103077067).

Almost surely, 2^206154133 is an apocalyptic number.

It is an amenable number.

206154133 is a deficient number, since it is larger than the sum of its proper divisors (1).

206154133 is an equidigital number, since it uses as much as digits as its factorization.

206154133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 206154133 is about 14358.0685678820. The cubic root of 206154133 is about 590.7413194304.

The spelling of 206154133 in words is "two hundred six million, one hundred fifty-four thousand, one hundred thirty-three".