55130123 has 4 divisors (see below), whose sum is σ = 56170368. Its totient is φ = 54089880.

The previous prime is 55130063. The next prime is 55130161. The reversal of 55130123 is 32103155.

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-55130123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55130095 and 55130104.

It is not an unprimeable number, because it can be changed into a prime (55130423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520043 + ... + 520148.

It is an arithmetic number, because the mean of its divisors is an integer number (14042592).

Almost surely, 2^55130123 is an apocalyptic number.

55130123 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

55130123 is a deficient number, since it is larger than the sum of its proper divisors (1040245).

55130123 is a wasteful number, since it uses less digits than its factorization.

55130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040244.

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

The square root of 55130123 is about 7424.9661952092. The cubic root of 55130123 is about 380.5949199205.

Adding to 55130123 its reverse (32103155), we get a palindrome (87233278).

The spelling of 55130123 in words is "fifty-five million, one hundred thirty thousand, one hundred twenty-three".