13085550 has 84 divisors (see below), whose sum is σ = 36593640. Its totient is φ = 3479760.

The previous prime is 13085543. The next prime is 13085557. The reversal of 13085550 is 5558031.

13085550 is a `hidden beast` number, since 1 + 30 + 85 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (13085543) and next prime (13085557).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13085557) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 36271 + ... + 36629.

Almost surely, 2^13085550 is an apocalyptic number.

13085550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13085550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18296820).

13085550 is an abundant number, since it is smaller than the sum of its proper divisors (23508090).

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

13085550 is an equidigital number, since it uses as much as digits as its factorization.

13085550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 13085550 is about 3617.3954718831. The cubic root of 13085550 is about 235.6481278323.

The spelling of 13085550 in words is "thirteen million, eighty-five thousand, five hundred fifty".