55013123 has 4 divisors (see below), whose sum is σ = 60014328. Its totient is φ = 50011920.

The previous prime is 55013093. The next prime is 55013137. The reversal of 55013123 is 32131055.

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 55013123 - 2⁶ = 55013059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55013095 and 55013104.

It is not an unprimeable number, because it can be changed into a prime (55013183) 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, 2500586 + ... + 2500607.

It is an arithmetic number, because the mean of its divisors is an integer number (15003582).

Almost surely, 2^55013123 is an apocalyptic number.

55013123 is a deficient number, since it is larger than the sum of its proper divisors (5001205).

55013123 is a wasteful number, since it uses less digits than its factorization.

55013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001204.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 55013123 is about 7417.0831868060. The cubic root of 55013123 is about 380.3254898195.

Adding to 55013123 its reverse (32131055), we get a palindrome (87144178).

The spelling of 55013123 in words is "fifty-five million, thirteen thousand, one hundred twenty-three".