206424131 has 4 divisors (see below), whose sum is σ = 206704200. Its totient is φ = 206144064.

The previous prime is 206424109. The next prime is 206424143. The reversal of 206424131 is 131424602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131424602 = 2 ⋅65712301.

It is a cyclic number.

It is not a de Polignac number, because 206424131 - 2¹⁸ = 206161987 is a prime.

It is a super-2 number, since 2×206424131² = 85221843718210322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206424097 and 206424106.

It is not an unprimeable number, because it can be changed into a prime (206424161) 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, 138926 + ... + 140403.

It is an arithmetic number, because the mean of its divisors is an integer number (51676050).

Almost surely, 2^206424131 is an apocalyptic number.

206424131 is a deficient number, since it is larger than the sum of its proper divisors (280069).

206424131 is an equidigital number, since it uses as much as digits as its factorization.

206424131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280068.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 206424131 is about 14367.4678005555. The cubic root of 206424131 is about 590.9991029177. Note that the first 3 decimals are identical.

Adding to 206424131 its reverse (131424602), we get a palindrome (337848733).

The spelling of 206424131 in words is "two hundred six million, four hundred twenty-four thousand, one hundred thirty-one".