55045423 has 2 divisors, whose sum is σ = 55045424. Its totient is φ = 55045422.

The previous prime is 55045421. The next prime is 55045447. The reversal of 55045423 is 32454055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55045423 - 2¹ = 55045421 is a prime.

Together with 55045421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55045391 and 55045400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55045421) 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 as a sum of consecutive naturals, namely, 27522711 + 27522712.

It is an arithmetic number, because the mean of its divisors is an integer number (27522712).

Almost surely, 2^55045423 is an apocalyptic number.

55045423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55045423 is an equidigital number, since it uses as much as digits as its factorization.

55045423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55045423 is about 7419.2602731000. The cubic root of 55045423 is about 380.3999090927.

Adding to 55045423 its reverse (32454055), we get a palindrome (87499478).

The spelling of 55045423 in words is "fifty-five million, forty-five thousand, four hundred twenty-three".