55315313243 has 4 divisors (see below), whose sum is σ = 55316155248. Its totient is φ = 55314471240.

The previous prime is 55315313239. The next prime is 55315313257. The reversal of 55315313243 is 34231351355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55315313243 - 2² = 55315313239 is a prime.

It is a super-2 number, since 2×55315313243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55315313213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313271 + ... + 456912.

It is an arithmetic number, because the mean of its divisors is an integer number (13829038812).

Almost surely, 2^55315313243 is an apocalyptic number.

55315313243 is a deficient number, since it is larger than the sum of its proper divisors (842005).

55315313243 is an equidigital number, since it uses as much as digits as its factorization.

55315313243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842004.

The product of its digits is 81000, while the sum is 35.

Adding to 55315313243 its reverse (34231351355), we get a palindrome (89546664598).

The spelling of 55315313243 in words is "fifty-five billion, three hundred fifteen million, three hundred thirteen thousand, two hundred forty-three".