55279219 has 6 divisors (see below), whose sum is σ = 55842260. Its totient is φ = 54721800.

The previous prime is 55279201. The next prime is 55279271. The reversal of 55279219 is 91297255.

It is not a de Polignac number, because 55279219 - 2⁵ = 55279187 is a prime.

It is a super-2 number, since 2×55279219² = 6111584106499922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55279619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7492 + ... + 12910.

Almost surely, 2^55279219 is an apocalyptic number.

55279219 is a deficient number, since it is larger than the sum of its proper divisors (563041).

55279219 is an equidigital number, since it uses as much as digits as its factorization.

55279219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5621 (or 5520 counting only the distinct ones).

The product of its digits is 56700, while the sum is 40.

The square root of 55279219 is about 7434.9995965030. Note that the first 3 decimals coincide. The cubic root of 55279219 is about 380.9377095439.

The spelling of 55279219 in words is "fifty-five million, two hundred seventy-nine thousand, two hundred nineteen".