13000055 has 4 divisors (see below), whose sum is σ = 15600072. Its totient is φ = 10400040.

The previous prime is 13000049. The next prime is 13000069. The reversal of 13000055 is 55000031.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13000055 - 2⁸ = 12999799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300001 + ... + 1300010.

It is an arithmetic number, because the mean of its divisors is an integer number (3900018).

Almost surely, 2^13000055 is an apocalyptic number.

13000055 is a deficient number, since it is larger than the sum of its proper divisors (2600017).

13000055 is an equidigital number, since it uses as much as digits as its factorization.

13000055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600016.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 13000055 is about 3605.5589025836. The cubic root of 13000055 is about 235.1338003701.

Adding to 13000055 its reverse (55000031), we get a palindrome (68000086).

The spelling of 13000055 in words is "thirteen million, fifty-five", and thus it is an aban number and an uban number.