55593221 has 8 divisors (see below), whose sum is σ = 58588320. Its totient is φ = 52605072.

The previous prime is 55593193. The next prime is 55593271. The reversal of 55593221 is 12239555.

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

It is not a de Polignac number, because 55593221 - 2²² = 51398917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55593271) 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, 27191 + ... + 29163.

It is an arithmetic number, because the mean of its divisors is an integer number (7323540).

Almost surely, 2^55593221 is an apocalyptic number.

It is an amenable number.

55593221 is a deficient number, since it is larger than the sum of its proper divisors (2995099).

55593221 is a wasteful number, since it uses less digits than its factorization.

55593221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475.

The product of its digits is 13500, while the sum is 32.

The square root of 55593221 is about 7456.0861717123. The cubic root of 55593221 is about 381.6576270453.

The spelling of 55593221 in words is "fifty-five million, five hundred ninety-three thousand, two hundred twenty-one".