13555091 has 16 divisors (see below), whose sum is σ = 15433728. Its totient is φ = 11793600.

The previous prime is 13555067. The next prime is 13555097. The reversal of 13555091 is 19055531.

It is a happy number.

13555091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13555091 - 2¹⁸ = 13292947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13555097) 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, 43151 + ... + 43463.

It is an arithmetic number, because the mean of its divisors is an integer number (964608).

Almost surely, 2^13555091 is an apocalyptic number.

13555091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13555091 is a deficient number, since it is larger than the sum of its proper divisors (1878637).

13555091 is a wasteful number, since it uses less digits than its factorization.

13555091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 13555091 is about 3681.7239168629. The cubic root of 13555091 is about 238.4336126934.

It can be divided in two parts, 1355 and 5091, that added together give a palindrome (6446).

The spelling of 13555091 in words is "thirteen million, five hundred fifty-five thousand, ninety-one".