13220085 has 16 divisors (see below), whose sum is σ = 21882240. Its totient is φ = 6807360.

The previous prime is 13220083. The next prime is 13220099. The reversal of 13220085 is 58002231.

It is not a de Polignac number, because 13220085 - 2¹ = 13220083 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14761 + ... + 15630.

It is an arithmetic number, because the mean of its divisors is an integer number (1367640).

Almost surely, 2^13220085 is an apocalyptic number.

13220085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13220085 is a deficient number, since it is larger than the sum of its proper divisors (8662155).

13220085 is a wasteful number, since it uses less digits than its factorization.

13220085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30428.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 13220085 is about 3635.9434814089. The cubic root of 13220085 is about 236.4529568060.

The spelling of 13220085 in words is "thirteen million, two hundred twenty thousand, eighty-five".