206164531 has 2 divisors, whose sum is σ = 206164532. Its totient is φ = 206164530.

The previous prime is 206164529. The next prime is 206164547. The reversal of 206164531 is 135461602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206164531 - 2¹ = 206164529 is a prime.

It is a super-2 number, since 2×206164531² = 85007627684899922, which contains 22 as substring.

Together with 206164529, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 206164531.

It is not a weakly prime, because it can be changed into another prime (206162531) 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, 103082265 + 103082266.

It is an arithmetic number, because the mean of its divisors is an integer number (103082266).

Almost surely, 2^206164531 is an apocalyptic number.

206164531 is a deficient number, since it is larger than the sum of its proper divisors (1).

206164531 is an equidigital number, since it uses as much as digits as its factorization.

206164531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 206164531 is about 14358.4306593722. The cubic root of 206164531 is about 590.7512511982.

The spelling of 206164531 in words is "two hundred six million, one hundred sixty-four thousand, five hundred thirty-one".