13531641 has 8 divisors (see below), whose sum is σ = 18128544. Its totient is φ = 8977920.

The previous prime is 13531633. The next prime is 13531663. The reversal of 13531641 is 14613531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13531641 - 2³ = 13531633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13538641) 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, 10056 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (2266068).

Almost surely, 2^13531641 is an apocalyptic number.

It is an amenable number.

13531641 is a deficient number, since it is larger than the sum of its proper divisors (4596903).

13531641 is a wasteful number, since it uses less digits than its factorization.

13531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21591.

The product of its digits is 1080, while the sum is 24.

The square root of 13531641 is about 3678.5378888901. The cubic root of 13531641 is about 238.2960384153.

The spelling of 13531641 in words is "thirteen million, five hundred thirty-one thousand, six hundred forty-one".