55442823 has 16 divisors (see below), whose sum is σ = 75832416. Its totient is φ = 36017280.

The previous prime is 55442819. The next prime is 55442833. The reversal of 55442823 is 32824455.

It is not a de Polignac number, because 55442823 - 2² = 55442819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55442833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23853 + ... + 26073.

It is an arithmetic number, because the mean of its divisors is an integer number (4739526).

Almost surely, 2^55442823 is an apocalyptic number.

55442823 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

55442823 is a deficient number, since it is larger than the sum of its proper divisors (20389593).

55442823 is a wasteful number, since it uses less digits than its factorization.

55442823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434.

The product of its digits is 38400, while the sum is 33.

The square root of 55442823 is about 7445.9937550336. The cubic root of 55442823 is about 381.3131462905.

It can be divided in two parts, 55442 and 823, that added together give a palindrome (56265).

The spelling of 55442823 in words is "fifty-five million, four hundred forty-two thousand, eight hundred twenty-three".