13015550 has 24 divisors (see below), whose sum is σ = 24372696. Its totient is φ = 5171040.

The previous prime is 13015549. The next prime is 13015559. The reversal of 13015550 is 5551031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13015559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7352 + ... + 8948.

It is an arithmetic number, because the mean of its divisors is an integer number (1015529).

Almost surely, 2^13015550 is an apocalyptic number.

13015550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13015550 is a deficient number, since it is larger than the sum of its proper divisors (11357146).

13015550 is a wasteful number, since it uses less digits than its factorization.

13015550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 13015550 is about 3607.7070280165. The cubic root of 13015550 is about 235.2271833507.

Adding to 13015550 its reverse (5551031), we get a palindrome (18566581).

The spelling of 13015550 in words is "thirteen million, fifteen thousand, five hundred fifty".