55579321 has 8 divisors (see below), whose sum is σ = 63875520. Its totient is φ = 47372208.

The previous prime is 55579319. The next prime is 55579327. The reversal of 55579321 is 12397555.

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 55579321 - 2¹ = 55579319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55579327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20926 + ... + 23431.

It is an arithmetic number, because the mean of its divisors is an integer number (7984440).

Almost surely, 2^55579321 is an apocalyptic number.

It is an amenable number.

55579321 is a deficient number, since it is larger than the sum of its proper divisors (8296199).

55579321 is a wasteful number, since it uses less digits than its factorization.

55579321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44543.

The product of its digits is 47250, while the sum is 37.

The square root of 55579321 is about 7455.1539890199. The cubic root of 55579321 is about 381.6258157134.

It can be divided in two parts, 5557 and 9321, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 55579321 in words is "fifty-five million, five hundred seventy-nine thousand, three hundred twenty-one".