55105131223 has 4 divisors (see below), whose sum is σ = 55132866040. Its totient is φ = 55077396408.

The previous prime is 55105131199. The next prime is 55105131299. The reversal of 55105131223 is 32213150155.

55105131223 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55105131223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55105131191 and 55105131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105171223) 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, 13864428 + ... + 13868401.

It is an arithmetic number, because the mean of its divisors is an integer number (13783216510).

Almost surely, 2^55105131223 is an apocalyptic number.

55105131223 is a deficient number, since it is larger than the sum of its proper divisors (27734817).

55105131223 is a wasteful number, since it uses less digits than its factorization.

55105131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27734816.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 55105131223 its reverse (32213150155), we get a palindrome (87318281378).

The spelling of 55105131223 in words is "fifty-five billion, one hundred five million, one hundred thirty-one thousand, two hundred twenty-three".