55727321 has 8 divisors (see below), whose sum is σ = 62623680. Its totient is φ = 49203792.

The previous prime is 55727303. The next prime is 55727381. The reversal of 55727321 is 12372755.

55727321 = 274² + 275² + ... + 572².

55727321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55727321 - 2⁶ = 55727257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55727381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92891 + ... + 93488.

It is an arithmetic number, because the mean of its divisors is an integer number (7827960).

Almost surely, 2^55727321 is an apocalyptic number.

It is an amenable number.

55727321 is a deficient number, since it is larger than the sum of its proper divisors (6896359).

55727321 is a wasteful number, since it uses less digits than its factorization.

55727321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186415.

The product of its digits is 14700, while the sum is 32.

The square root of 55727321 is about 7465.0734088822. The cubic root of 55727321 is about 381.9642543053.

The spelling of 55727321 in words is "fifty-five million, seven hundred twenty-seven thousand, three hundred twenty-one".