13155649 has 4 divisors (see below), whose sum is σ = 14167636. Its totient is φ = 12143664.

The previous prime is 13155641. The next prime is 13155673. The reversal of 13155649 is 94655131.

13155649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4494400 + 8661249 = 2120^2 + 2943^2 .

It is not a de Polignac number, because 13155649 - 2³ = 13155641 is a prime.

It is a super-2 number, since 2×13155649² = 346142201222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505974 + ... + 505999.

It is an arithmetic number, because the mean of its divisors is an integer number (3541909).

Almost surely, 2^13155649 is an apocalyptic number.

It is an amenable number.

13155649 is a deficient number, since it is larger than the sum of its proper divisors (1011987).

13155649 is a wasteful number, since it uses less digits than its factorization.

13155649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011986.

The product of its digits is 16200, while the sum is 34.

The square root of 13155649 is about 3627.0716838794. The cubic root of 13155649 is about 236.0681659359.

The spelling of 13155649 in words is "thirteen million, one hundred fifty-five thousand, six hundred forty-nine".