206430131 has 2 divisors, whose sum is σ = 206430132. Its totient is φ = 206430130.

The previous prime is 206430109. The next prime is 206430179. The reversal of 206430131 is 131034602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206430131 - 2²⁶ = 139321267 is a prime.

It is a super-2 number, since 2×206430131² = 85226797969354322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206130131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103215065 + 103215066.

It is an arithmetic number, because the mean of its divisors is an integer number (103215066).

Almost surely, 2^206430131 is an apocalyptic number.

206430131 is a deficient number, since it is larger than the sum of its proper divisors (1).

206430131 is an equidigital number, since it uses as much as digits as its factorization.

206430131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 206430131 is about 14367.6766040999. The cubic root of 206430131 is about 591.0048289282.

Adding to 206430131 its reverse (131034602), we get a palindrome (337464733).

The spelling of 206430131 in words is "two hundred six million, four hundred thirty thousand, one hundred thirty-one".