55433321 has 16 divisors (see below), whose sum is σ = 58595328. Its totient is φ = 52390800.

The previous prime is 55433303. The next prime is 55433327. The reversal of 55433321 is 12333455.

It is a cyclic number.

It is not a de Polignac number, because 55433321 - 2¹⁸ = 55171177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55433327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204416 + ... + 204686.

It is an arithmetic number, because the mean of its divisors is an integer number (3662208).

Almost surely, 2^55433321 is an apocalyptic number.

It is an amenable number.

55433321 is a deficient number, since it is larger than the sum of its proper divisors (3162007).

55433321 is a wasteful number, since it uses less digits than its factorization.

55433321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

The product of its digits is 5400, while the sum is 26.

The square root of 55433321 is about 7445.3556664541. The cubic root of 55433321 is about 381.2913614178.

Adding to 55433321 its reverse (12333455), we get a palindrome (67766776).

The spelling of 55433321 in words is "fifty-five million, four hundred thirty-three thousand, three hundred twenty-one".