55042423 has 2 divisors, whose sum is σ = 55042424. Its totient is φ = 55042422.

The previous prime is 55042399. The next prime is 55042441. The reversal of 55042423 is 32424055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55042423 - 2⁹ = 55041911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55042483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27521211 + 27521212.

It is an arithmetic number, because the mean of its divisors is an integer number (27521212).

Almost surely, 2^55042423 is an apocalyptic number.

55042423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55042423 is an equidigital number, since it uses as much as digits as its factorization.

55042423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 55042423 is about 7419.0580938553. The cubic root of 55042423 is about 380.3929983125.

Adding to 55042423 its reverse (32424055), we get a palindrome (87466478).

The spelling of 55042423 in words is "fifty-five million, forty-two thousand, four hundred twenty-three".