55242212 has 12 divisors (see below), whose sum is σ = 96726000. Its totient is φ = 27606216.

The previous prime is 55242199. The next prime is 55242241. The reversal of 55242212 is 21224255.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12023 + ... + 15969.

It is an arithmetic number, because the mean of its divisors is an integer number (8060500).

Almost surely, 2^55242212 is an apocalyptic number.

It is an amenable number.

55242212 is a deficient number, since it is larger than the sum of its proper divisors (41483788).

55242212 is a wasteful number, since it uses less digits than its factorization.

55242212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7450 (or 7448 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 55242212 is about 7432.5104776246. The cubic root of 55242212 is about 380.8526835667.

Adding to 55242212 its reverse (21224255), we get a palindrome (76466467).

The spelling of 55242212 in words is "fifty-five million, two hundred forty-two thousand, two hundred twelve".