55404233 has 4 divisors (see below), whose sum is σ = 55504260. Its totient is φ = 55304208.

The previous prime is 55404227. The next prime is 55404313. The reversal of 55404233 is 33240455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33240455 = 5 ⋅6648091.

It can be written as a sum of positive squares in 2 ways, for example, as 8111104 + 47293129 = 2848^2 + 6877^2 .

It is a cyclic number.

It is not a de Polignac number, because 55404233 - 2⁸ = 55403977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55404203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49178 + ... + 50291.

It is an arithmetic number, because the mean of its divisors is an integer number (13876065).

Almost surely, 2^55404233 is an apocalyptic number.

It is an amenable number.

55404233 is a deficient number, since it is larger than the sum of its proper divisors (100027).

55404233 is an equidigital number, since it uses as much as digits as its factorization.

55404233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100026.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 55404233 is about 7443.4019775906. The cubic root of 55404233 is about 381.2246569914.

Adding to 55404233 its reverse (33240455), we get a palindrome (88644688).

The spelling of 55404233 in words is "fifty-five million, four hundred four thousand, two hundred thirty-three".