13123215 has 48 divisors (see below), whose sum is σ = 26976768. Its totient is φ = 5995296.

The previous prime is 13123211. The next prime is 13123217. The reversal of 13123215 is 51232131.

It is not a de Polignac number, because 13123215 - 2² = 13123211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7734 + ... + 9276.

It is an arithmetic number, because the mean of its divisors is an integer number (562016).

Almost surely, 2^13123215 is an apocalyptic number.

13123215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13123215 is an abundant number, since it is smaller than the sum of its proper divisors (13853553).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123215 is an equidigital number, since it uses as much as digits as its factorization.

13123215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570 (or 1558 counting only the distinct ones).

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

The square root of 13123215 is about 3622.5978247661. The cubic root of 13123215 is about 235.8740050913.

Adding to 13123215 its reverse (51232131), we get a palindrome (64355346).

The spelling of 13123215 in words is "thirteen million, one hundred twenty-three thousand, two hundred fifteen".