249421219 has 2 divisors, whose sum is σ = 249421220. Its totient is φ = 249421218.

The previous prime is 249421213. The next prime is 249421247. The reversal of 249421219 is 912124942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249421219 - 2¹⁷ = 249290147 is a prime.

It is a super-2 number, since 2×249421219² = 124421888974891922, which contains 22 as substring.

It is equal to p_13649416 and since 249421219 and 13649416 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (249421213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124710609 + 124710610.

It is an arithmetic number, because the mean of its divisors is an integer number (124710610).

Almost surely, 2^249421219 is an apocalyptic number.

249421219 is a deficient number, since it is larger than the sum of its proper divisors (1).

249421219 is an equidigital number, since it uses as much as digits as its factorization.

249421219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 249421219 is about 15793.0750330643. The cubic root of 249421219 is about 629.4740037249.

The spelling of 249421219 in words is "two hundred forty-nine million, four hundred twenty-one thousand, two hundred nineteen".