55305321 has 8 divisors (see below), whose sum is σ = 73776384. Its totient is φ = 36852240.

The previous prime is 55305319. The next prime is 55305329. The reversal of 55305321 is 12350355.

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

It is not a de Polignac number, because 55305321 - 2¹ = 55305319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55305291 and 55305300.

It is not an unprimeable number, because it can be changed into a prime (55305329) 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, 6591 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (9222048).

Almost surely, 2^55305321 is an apocalyptic number.

It is an amenable number.

55305321 is a deficient number, since it is larger than the sum of its proper divisors (18471063).

55305321 is a wasteful number, since it uses less digits than its factorization.

55305321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 55305321 is about 7436.7547357702. The cubic root of 55305321 is about 380.9976577587.

Adding to 55305321 its reverse (12350355), we get a palindrome (67655676).

The spelling of 55305321 in words is "fifty-five million, three hundred five thousand, three hundred twenty-one".