206140511 has 4 divisors (see below), whose sum is σ = 206763624. Its totient is φ = 205517400.

The previous prime is 206140463. The next prime is 206140523. The reversal of 206140511 is 115041602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206140511 - 2²² = 201946207 is a prime.

It is a super-2 number, since 2×206140511² = 84987820550682242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206149511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311060 + ... + 311721.

It is an arithmetic number, because the mean of its divisors is an integer number (51690906).

Almost surely, 2^206140511 is an apocalyptic number.

206140511 is a deficient number, since it is larger than the sum of its proper divisors (623113).

206140511 is an equidigital number, since it uses as much as digits as its factorization.

206140511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623112.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 206140511 is about 14357.5941926215. The cubic root of 206140511 is about 590.7283077170.

The spelling of 206140511 in words is "two hundred six million, one hundred forty thousand, five hundred eleven".