13564441 has 12 divisors (see below), whose sum is σ = 15061680. Its totient is φ = 12114680.

The previous prime is 13564433. The next prime is 13564471. The reversal of 13564441 is 14446531.

It is not a de Polignac number, because 13564441 - 2³ = 13564433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13564471) 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, 75690 + ... + 75868.

It is an arithmetic number, because the mean of its divisors is an integer number (1255140).

Almost surely, 2^13564441 is an apocalyptic number.

13564441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13564441 is the 1969-th nonagonal number.

It is an amenable number.

13564441 is a deficient number, since it is larger than the sum of its proper divisors (1497239).

13564441 is an equidigital number, since it uses as much as digits as its factorization.

13564441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 273 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 13564441 is about 3682.9934835674. The cubic root of 13564441 is about 238.4884221592.

The spelling of 13564441 in words is "thirteen million, five hundred sixty-four thousand, four hundred forty-one".