206290531 has 2 divisors, whose sum is σ = 206290532. Its totient is φ = 206290530.

The previous prime is 206290507. The next prime is 206290537. The reversal of 206290531 is 135092602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206290531 - 2⁵ = 206290499 is a prime.

It is a super-2 number, since 2×206290531² = 85111566360523922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_11407807 and since 206290531 and 11407807 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206290531.

It is not a weakly prime, because it can be changed into another prime (206290537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103145265 + 103145266.

It is an arithmetic number, because the mean of its divisors is an integer number (103145266).

Almost surely, 2^206290531 is an apocalyptic number.

206290531 is a deficient number, since it is larger than the sum of its proper divisors (1).

206290531 is an equidigital number, since it uses as much as digits as its factorization.

206290531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 206290531 is about 14362.8176553210. The cubic root of 206290531 is about 590.8715749975.

The spelling of 206290531 in words is "two hundred six million, two hundred ninety thousand, five hundred thirty-one".