55217843 has 8 divisors (see below), whose sum is σ = 55680000. Its totient is φ = 54758088.

The previous prime is 55217837. The next prime is 55217867. The reversal of 55217843 is 34871255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55217843 - 2¹² = 55213747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55217803) 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, 110408 + ... + 110906.

It is an arithmetic number, because the mean of its divisors is an integer number (6960000).

Almost surely, 2^55217843 is an apocalyptic number.

55217843 is a deficient number, since it is larger than the sum of its proper divisors (462157).

55217843 is a wasteful number, since it uses less digits than its factorization.

55217843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its digits is 33600, while the sum is 35.

The square root of 55217843 is about 7430.8709449162. The cubic root of 55217843 is about 380.7966734749.

The spelling of 55217843 in words is "fifty-five million, two hundred seventeen thousand, eight hundred forty-three".