55089217 has 4 divisors (see below), whose sum is σ = 56261376. Its totient is φ = 53917060.

The previous prime is 55089193. The next prime is 55089239. The reversal of 55089217 is 71298055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55089217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55089247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586009 + ... + 586102.

It is an arithmetic number, because the mean of its divisors is an integer number (14065344).

Almost surely, 2^55089217 is an apocalyptic number.

It is an amenable number.

55089217 is a deficient number, since it is larger than the sum of its proper divisors (1172159).

55089217 is a wasteful number, since it uses less digits than its factorization.

55089217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172158.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55089217 is about 7422.2110587075. The cubic root of 55089217 is about 380.5007640875.

The spelling of 55089217 in words is "fifty-five million, eighty-nine thousand, two hundred seventeen".