55255321 has 16 divisors (see below), whose sum is σ = 64196928. Its totient is φ = 47001600.

The previous prime is 55255307. The next prime is 55255349. The reversal of 55255321 is 12355255.

It is not a de Polignac number, because 55255321 - 2¹⁵ = 55222553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55255321.

It is not an unprimeable number, because it can be changed into a prime (55255381) 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 15 ways as a sum of consecutive naturals, for example, 35326 + ... + 36856.

It is an arithmetic number, because the mean of its divisors is an integer number (4012308).

Almost surely, 2^55255321 is an apocalyptic number.

It is an amenable number.

55255321 is a deficient number, since it is larger than the sum of its proper divisors (8941607).

55255321 is a wasteful number, since it uses less digits than its factorization.

55255321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its digits is 7500, while the sum is 28.

The square root of 55255321 is about 7433.3922942355. The cubic root of 55255321 is about 380.8828066844.

The spelling of 55255321 in words is "fifty-five million, two hundred fifty-five thousand, three hundred twenty-one".