55448217 has 12 divisors (see below), whose sum is σ = 87373104. Its totient is φ = 33604920.

The previous prime is 55448209. The next prime is 55448221. The reversal of 55448217 is 71284455.

It is not a de Polignac number, because 55448217 - 2³ = 55448209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55448117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279943 + ... + 280140.

It is an arithmetic number, because the mean of its divisors is an integer number (7281092).

Almost surely, 2^55448217 is an apocalyptic number.

It is an amenable number.

55448217 is a deficient number, since it is larger than the sum of its proper divisors (31924887).

55448217 is a wasteful number, since it uses less digits than its factorization.

55448217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560100 (or 560097 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 55448217 is about 7446.3559544250. The cubic root of 55448217 is about 381.3255118009.

The spelling of 55448217 in words is "fifty-five million, four hundred forty-eight thousand, two hundred seventeen".