13215123 has 8 divisors (see below), whose sum is σ = 19578000. Its totient is φ = 8810064.

The previous prime is 13215121. The next prime is 13215151. The reversal of 13215123 is 32151231.

13215123 is nontrivially palindromic in base 2.

13215123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13215123 - 2¹ = 13215121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13215096 and 13215105.

It is not an unprimeable number, because it can be changed into a prime (13215121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244698 + ... + 244751.

It is an arithmetic number, because the mean of its divisors is an integer number (2447250).

Almost surely, 2^13215123 is an apocalyptic number.

13215123 is a deficient number, since it is larger than the sum of its proper divisors (6362877).

13215123 is an equidigital number, since it uses as much as digits as its factorization.

13215123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489458 (or 489452 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13215123 is about 3635.2610635276. The cubic root of 13215123 is about 236.4233698456.

Adding to 13215123 its reverse (32151231), we get a palindrome (45366354).

The spelling of 13215123 in words is "thirteen million, two hundred fifteen thousand, one hundred twenty-three".