55220419 has 2 divisors, whose sum is σ = 55220420. Its totient is φ = 55220418.

The previous prime is 55220413. The next prime is 55220491. The reversal of 55220419 is 91402255.

Together with next prime (55220491) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55220419 is a prime.

It is a super-2 number, since 2×55220419² = 6098589349071122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55220413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27610209 + 27610210.

It is an arithmetic number, because the mean of its divisors is an integer number (27610210).

Almost surely, 2^55220419 is an apocalyptic number.

55220419 is a deficient number, since it is larger than the sum of its proper divisors (1).

55220419 is an equidigital number, since it uses as much as digits as its factorization.

55220419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55220419 is about 7431.0442738555. The cubic root of 55220419 is about 380.8025949725.

The spelling of 55220419 in words is "fifty-five million, two hundred twenty thousand, four hundred nineteen".