206417131 has 2 divisors, whose sum is σ = 206417132. Its totient is φ = 206417130.

The previous prime is 206417089. The next prime is 206417143. The reversal of 206417131 is 131714602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206417131 - 2¹⁵ = 206384363 is a prime.

It is a super-2 number, since 2×206417131² = 85216063940542322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206417096 and 206417105.

It is not a weakly prime, because it can be changed into another prime (206417171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103208565 + 103208566.

It is an arithmetic number, because the mean of its divisors is an integer number (103208566).

Almost surely, 2^206417131 is an apocalyptic number.

206417131 is a deficient number, since it is larger than the sum of its proper divisors (1).

206417131 is an equidigital number, since it uses as much as digits as its factorization.

206417131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 206417131 is about 14367.2241925850. The cubic root of 206417131 is about 590.9924224318.

It can be divided in two parts, 20641 and 7131, that added together give a palindrome (27772).

The spelling of 206417131 in words is "two hundred six million, four hundred seventeen thousand, one hundred thirty-one".