251219 has 2 divisors, whose sum is σ = 251220. Its totient is φ = 251218.

The previous prime is 251203. The next prime is 251221. The reversal of 251219 is 912152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251219 - 2⁴ = 251203 is a prime.

It is a super-2 number, since 2×251219² = 126221971922, which contains 22 as substring.

Together with 251221, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251219.

It is not a weakly prime, because it can be changed into another prime (251519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125609 + 125610.

It is an arithmetic number, because the mean of its divisors is an integer number (125610).

2²⁵¹²¹⁹ is an apocalyptic number.

251219 is a deficient number, since it is larger than the sum of its proper divisors (1).

251219 is an equidigital number, since it uses as much as digits as its factorization.

251219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 251219 is about 501.2175176508. The cubic root of 251219 is about 63.0982761109.

The spelling of 251219 in words is "two hundred fifty-one thousand, two hundred nineteen".