55212226 has 16 divisors (see below), whose sum is σ = 87868800. Its totient is φ = 25929280.

The previous prime is 55212217. The next prime is 55212239. The reversal of 55212226 is 62221255.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55212226.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19011 + ... + 21721.

It is an arithmetic number, because the mean of its divisors is an integer number (5491800).

Almost surely, 2^55212226 is an apocalyptic number.

55212226 is a deficient number, since it is larger than the sum of its proper divisors (32656574).

55212226 is a wasteful number, since it uses less digits than its factorization.

55212226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329.

The product of its digits is 2400, while the sum is 25.

The square root of 55212226 is about 7430.4929849910. The cubic root of 55212226 is about 380.7837609372.

The spelling of 55212226 in words is "fifty-five million, two hundred twelve thousand, two hundred twenty-six".