55320623 has 2 divisors, whose sum is σ = 55320624. Its totient is φ = 55320622.

The previous prime is 55320611. The next prime is 55320653. The reversal of 55320623 is 32602355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55320623 - 2¹⁰ = 55319599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55320592 and 55320601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55320653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27660311 + 27660312.

It is an arithmetic number, because the mean of its divisors is an integer number (27660312).

Almost surely, 2^55320623 is an apocalyptic number.

55320623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55320623 is an equidigital number, since it uses as much as digits as its factorization.

55320623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 55320623 is about 7437.7834735894. The cubic root of 55320623 is about 381.0327929467.

Adding to 55320623 its reverse (32602355), we get a palindrome (87922978).

The spelling of 55320623 in words is "fifty-five million, three hundred twenty thousand, six hundred twenty-three".