206251 has 2 divisors, whose sum is σ = 206252. Its totient is φ = 206250.

The previous prime is 206249. The next prime is 206263. The reversal of 206251 is 152602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206251 - 2¹ = 206249 is a prime.

Together with 206249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (206221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103125 + 103126.

It is an arithmetic number, because the mean of its divisors is an integer number (103126).

2²⁰⁶²⁵¹ is an apocalyptic number.

206251 is a deficient number, since it is larger than the sum of its proper divisors (1).

206251 is an equidigital number, since it uses as much as digits as its factorization.

206251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 206251 is about 454.1486540771. The cubic root of 206251 is about 59.0833830114.

Adding to 206251 its reverse (152602), we get a palindrome (358853).

The spelling of 206251 in words is "two hundred six thousand, two hundred fifty-one".