55123042043 has 4 divisors (see below), whose sum is σ = 55139224800. Its totient is φ = 55106859288.

The previous prime is 55123042021. The next prime is 55123042061. The reversal of 55123042043 is 34024032155.

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 55123042043 - 2¹⁶ = 55122976507 is a prime.

It is a super-2 number, since 2×55123042043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55123041997 and 55123042015.

It is not an unprimeable number, because it can be changed into a prime (55123042343) 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, 8086268 + ... + 8093081.

It is an arithmetic number, because the mean of its divisors is an integer number (13784806200).

Almost surely, 2^55123042043 is an apocalyptic number.

55123042043 is a deficient number, since it is larger than the sum of its proper divisors (16182757).

55123042043 is a wasteful number, since it uses less digits than its factorization.

55123042043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16182756.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 55123042043 its reverse (34024032155), we get a palindrome (89147074198).

The spelling of 55123042043 in words is "fifty-five billion, one hundred twenty-three million, forty-two thousand, forty-three".