55315423 has 2 divisors, whose sum is σ = 55315424. Its totient is φ = 55315422.

The previous prime is 55315417. The next prime is 55315427. The reversal of 55315423 is 32451355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55315423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55315391 and 55315400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55315427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27657711 + 27657712.

It is an arithmetic number, because the mean of its divisors is an integer number (27657712).

Almost surely, 2^55315423 is an apocalyptic number.

55315423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55315423 is an equidigital number, since it uses as much as digits as its factorization.

55315423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 28.

The square root of 55315423 is about 7437.4338988659. The cubic root of 55315423 is about 381.0208538632.

Adding to 55315423 its reverse (32451355), we get a palindrome (87766778).

The spelling of 55315423 in words is "fifty-five million, three hundred fifteen thousand, four hundred twenty-three".