255251 has 2 divisors, whose sum is σ = 255252. Its totient is φ = 255250.

The previous prime is 255247. The next prime is 255253. The reversal of 255251 is 152552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255251 - 2² = 255247 is a prime.

Together with 255253, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (255253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127625 + 127626.

It is an arithmetic number, because the mean of its divisors is an integer number (127626).

2²⁵⁵²⁵¹ is an apocalyptic number.

255251 is a deficient number, since it is larger than the sum of its proper divisors (1).

255251 is an equidigital number, since it uses as much as digits as its factorization.

255251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500, while the sum is 20.

The square root of 255251 is about 505.2237128243. The cubic root of 255251 is about 63.4340564107.

The spelling of 255251 in words is "two hundred fifty-five thousand, two hundred fifty-one".