55443313 has 4 divisors (see below), whose sum is σ = 55603440. Its totient is φ = 55283188.

The previous prime is 55443301. The next prime is 55443329. The reversal of 55443313 is 31334455.

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 55443313 - 2⁹ = 55442801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55440313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79543 + ... + 80236.

It is an arithmetic number, because the mean of its divisors is an integer number (13900860).

Almost surely, 2^55443313 is an apocalyptic number.

It is an amenable number.

55443313 is a deficient number, since it is larger than the sum of its proper divisors (160127).

55443313 is a wasteful number, since it uses less digits than its factorization.

55443313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160126.

The product of its digits is 10800, while the sum is 28.

The square root of 55443313 is about 7446.0266585609. The cubic root of 55443313 is about 381.3142696273.

Adding to 55443313 its reverse (31334455), we get a palindrome (86777768).

The spelling of 55443313 in words is "fifty-five million, four hundred forty-three thousand, three hundred thirteen".