13605550 has 24 divisors (see below), whose sum is σ = 28922256. Its totient is φ = 4664640.

The previous prime is 13605547. The next prime is 13605551. The reversal of 13605550 is 5550631.

It is a super-2 number, since 2×13605550² = 370221981605000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605551) 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, 19087 + ... + 19786.

It is an arithmetic number, because the mean of its divisors is an integer number (1205094).

Almost surely, 2^13605550 is an apocalyptic number.

13605550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13605550 is an abundant number, since it is smaller than the sum of its proper divisors (15316706).

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

13605550 is a wasteful number, since it uses less digits than its factorization.

13605550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38892 (or 38887 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 13605550 is about 3688.5701836891. The cubic root of 13605550 is about 238.7291037329.

The spelling of 13605550 in words is "thirteen million, six hundred five thousand, five hundred fifty".