55115123 has 4 divisors (see below), whose sum is σ = 62988720. Its totient is φ = 47241528.

The previous prime is 55115083. The next prime is 55115129. The reversal of 55115123 is 32151155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32151155 = 5 ⋅6430231.

It is a cyclic number.

It is not a de Polignac number, because 55115123 - 2¹² = 55111027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55115129) 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, 3936788 + ... + 3936801.

It is an arithmetic number, because the mean of its divisors is an integer number (15747180).

Almost surely, 2^55115123 is an apocalyptic number.

55115123 is a deficient number, since it is larger than the sum of its proper divisors (7873597).

55115123 is an equidigital number, since it uses as much as digits as its factorization.

55115123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873596.

The product of its digits is 750, while the sum is 23.

The square root of 55115123 is about 7423.9560208827. The cubic root of 55115123 is about 380.5603989162.

Adding to 55115123 its reverse (32151155), we get a palindrome (87266278).

The spelling of 55115123 in words is "fifty-five million, one hundred fifteen thousand, one hundred twenty-three".