206623051 has 2 divisors, whose sum is σ = 206623052. Its totient is φ = 206623050.

The previous prime is 206623033. The next prime is 206623169. The reversal of 206623051 is 150326602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206623051 is a prime.

It is not a weakly prime, because it can be changed into another prime (206623951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103311525 + 103311526.

It is an arithmetic number, because the mean of its divisors is an integer number (103311526).

Almost surely, 2^206623051 is an apocalyptic number.

206623051 is a deficient number, since it is larger than the sum of its proper divisors (1).

206623051 is an equidigital number, since it uses as much as digits as its factorization.

206623051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 206623051 is about 14374.3887174377. The cubic root of 206623051 is about 591.1888801473.

Adding to 206623051 its reverse (150326602), we get a palindrome (356949653).

The spelling of 206623051 in words is "two hundred six million, six hundred twenty-three thousand, fifty-one".