55238217 has 8 divisors (see below), whose sum is σ = 74750496. Its totient is φ = 36275712.

The previous prime is 55238191. The next prime is 55238231. The reversal of 55238217 is 71283255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55238217 - 2⁸ = 55237961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55238237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137208 + ... + 137609.

It is an arithmetic number, because the mean of its divisors is an integer number (9343812).

Almost surely, 2^55238217 is an apocalyptic number.

It is an amenable number.

55238217 is a deficient number, since it is larger than the sum of its proper divisors (19512279).

55238217 is a wasteful number, since it uses less digits than its factorization.

55238217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274887.

The product of its digits is 16800, while the sum is 33.

The square root of 55238217 is about 7432.2417210422. The cubic root of 55238217 is about 380.8435025250.

It can be divided in two parts, 55238 and 217, that added together give a palindrome (55455).

The spelling of 55238217 in words is "fifty-five million, two hundred thirty-eight thousand, two hundred seventeen".