55705321 has 8 divisors (see below), whose sum is σ = 67014080. Its totient is φ = 45234288.

The previous prime is 55705319. The next prime is 55705373. The reversal of 55705321 is 12350755.

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

It is not a de Polignac number, because 55705321 - 2¹ = 55705319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55705321.

It is not an unprimeable number, because it can be changed into a prime (55705621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209286 + ... + 209551.

It is an arithmetic number, because the mean of its divisors is an integer number (8376760).

Almost surely, 2^55705321 is an apocalyptic number.

It is an amenable number.

55705321 is a deficient number, since it is larger than the sum of its proper divisors (11308759).

55705321 is a wasteful number, since it uses less digits than its factorization.

55705321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418863.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 55705321 is about 7463.5997347125. The cubic root of 55705321 is about 381.9139838126.

The spelling of 55705321 in words is "fifty-five million, seven hundred five thousand, three hundred twenty-one".