55623313 has 4 divisors (see below), whose sum is σ = 55673968. Its totient is φ = 55572660.

The previous prime is 55623307. The next prime is 55623329. The reversal of 55623313 is 31332655.

55623313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55623313 - 2²⁵ = 22068881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55623353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23643 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (13918492).

Almost surely, 2^55623313 is an apocalyptic number.

It is an amenable number.

55623313 is a deficient number, since it is larger than the sum of its proper divisors (50655).

55623313 is a wasteful number, since it uses less digits than its factorization.

55623313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50654.

The product of its digits is 8100, while the sum is 28.

The square root of 55623313 is about 7458.1038474937. The cubic root of 55623313 is about 381.7264769850.

Adding to 55623313 its reverse (31332655), we get a palindrome (86955968).

The spelling of 55623313 in words is "fifty-five million, six hundred twenty-three thousand, three hundred thirteen".