13555161 has 8 divisors (see below), whose sum is σ = 20081760. Its totient is φ = 9036756.

The previous prime is 13555147. The next prime is 13555177. The reversal of 13555161 is 16155531.

It is not a de Polignac number, because 13555161 - 2⁶ = 13555097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 502043 = 13555161 / (1 + 3 + 5 + 5 + 5 + 1 + 6 + 1).

It is not an unprimeable number, because it can be changed into a prime (13555111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250995 + ... + 251048.

It is an arithmetic number, because the mean of its divisors is an integer number (2510220).

Almost surely, 2^13555161 is an apocalyptic number.

It is an amenable number.

13555161 is a deficient number, since it is larger than the sum of its proper divisors (6526599).

13555161 is an equidigital number, since it uses as much as digits as its factorization.

13555161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502052 (or 502046 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 13555161 is about 3681.7334232668. The cubic root of 13555161 is about 238.4340231253.

The spelling of 13555161 in words is "thirteen million, five hundred fifty-five thousand, one hundred sixty-one".