55516321313 has 4 divisors (see below), whose sum is σ = 55737502128. Its totient is φ = 55295140500.

The previous prime is 55516321291. The next prime is 55516321319. The reversal of 55516321313 is 31312361555.

55516321313 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 55516321313 - 2⁶ = 55516321249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55516321319) 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, 110590031 + ... + 110590532.

It is an arithmetic number, because the mean of its divisors is an integer number (13934375532).

Almost surely, 2^55516321313 is an apocalyptic number.

It is an amenable number.

55516321313 is a deficient number, since it is larger than the sum of its proper divisors (221180815).

55516321313 is a wasteful number, since it uses less digits than its factorization.

55516321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221180814.

The product of its digits is 40500, while the sum is 35.

Adding to 55516321313 its reverse (31312361555), we get a palindrome (86828682868).

The spelling of 55516321313 in words is "fifty-five billion, five hundred sixteen million, three hundred twenty-one thousand, three hundred thirteen".