221025419 has 2 divisors, whose sum is σ = 221025420. Its totient is φ = 221025418.

The previous prime is 221025403. The next prime is 221025439. The reversal of 221025419 is 914520122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221025419 - 2⁴ = 221025403 is a prime.

It is a super-2 number, since 2×221025419² = 97704471688251122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221025439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110512709 + 110512710.

It is an arithmetic number, because the mean of its divisors is an integer number (110512710).

Almost surely, 2^221025419 is an apocalyptic number.

221025419 is a deficient number, since it is larger than the sum of its proper divisors (1).

221025419 is an equidigital number, since it uses as much as digits as its factorization.

221025419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 221025419 is about 14866.9236562242. The cubic root of 221025419 is about 604.6175384774.

The spelling of 221025419 in words is "two hundred twenty-one million, twenty-five thousand, four hundred nineteen".