13800015 has 24 divisors (see below), whose sum is σ = 24008400. Its totient is φ = 7332864.

The previous prime is 13800013. The next prime is 13800019. The reversal of 13800015 is 51000831.

It is a happy number.

13800015 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13800015 - 2¹ = 13800013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13800013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19864 + ... + 20546.

It is an arithmetic number, because the mean of its divisors is an integer number (1000350).

Almost surely, 2^13800015 is an apocalyptic number.

13800015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13800015 is a deficient number, since it is larger than the sum of its proper divisors (10208385).

13800015 is a wasteful number, since it uses less digits than its factorization.

13800015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 13800015 is about 3714.8371431329. The cubic root of 13800015 is about 239.8611175641.

Adding to 13800015 its reverse (51000831), we get a palindrome (64800846).

The spelling of 13800015 in words is "thirteen million, eight hundred thousand, fifteen".