206011431 has 10 divisors (see below), whose sum is σ = 307745592. Its totient is φ = 137340900.

The previous prime is 206011427. The next prime is 206011439. The reversal of 206011431 is 134110602.

It is a happy number.

206011431 is a `hidden beast` number, since 20 + 601 + 1 + 43 + 1 = 666.

It is not a de Polignac number, because 206011431 - 2² = 206011427 is a prime.

It is a super-2 number, since 2×206011431² = 84881419405335522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206011439) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1271595 + ... + 1271756.

Almost surely, 2^206011431 is an apocalyptic number.

206011431 is a deficient number, since it is larger than the sum of its proper divisors (101734161).

206011431 is an equidigital number, since it uses as much as digits as its factorization.

206011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543363 (or 2543354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 206011431 is about 14353.0983066375. The cubic root of 206011431 is about 590.6049822392.

The spelling of 206011431 in words is "two hundred six million, eleven thousand, four hundred thirty-one".