15228123 has 4 divisors (see below), whose sum is σ = 20304168. Its totient is φ = 10152080.

The previous prime is 15228113. The next prime is 15228131. The reversal of 15228123 is 32182251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32182251 = 3 ⋅10727417.

It is a cyclic number.

It is not a de Polignac number, because 15228123 - 2¹⁴ = 15211739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15228093 and 15228102.

It is not an unprimeable number, because it can be changed into a prime (15228113) 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, 2538018 + ... + 2538023.

It is an arithmetic number, because the mean of its divisors is an integer number (5076042).

Almost surely, 2^15228123 is an apocalyptic number.

15228123 is a deficient number, since it is larger than the sum of its proper divisors (5076045).

15228123 is an equidigital number, since it uses as much as digits as its factorization.

15228123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076044.

The product of its digits is 960, while the sum is 24.

The square root of 15228123 is about 3902.3227698385. The cubic root of 15228123 is about 247.8651441206.

It can be divided in two parts, 15228 and 123, that added together give a palindrome (15351).

The spelling of 15228123 in words is "fifteen million, two hundred twenty-eight thousand, one hundred twenty-three".