13641531 has 8 divisors (see below), whose sum is σ = 19258704. Its totient is φ = 8559360.

The previous prime is 13641527. The next prime is 13641533. The reversal of 13641531 is 13514631.

13641531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13641531 - 2² = 13641527 is a prime.

It is a super-2 number, since 2×13641531² = 372182736047922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13641533) 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, 133690 + ... + 133791.

It is an arithmetic number, because the mean of its divisors is an integer number (2407338).

Almost surely, 2^13641531 is an apocalyptic number.

13641531 is a deficient number, since it is larger than the sum of its proper divisors (5617173).

13641531 is a wasteful number, since it uses less digits than its factorization.

13641531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267501.

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

The square root of 13641531 is about 3693.4443274537. Note that the first 3 decimals coincide. The cubic root of 13641531 is about 238.9393647641.

The spelling of 13641531 in words is "thirteen million, six hundred forty-one thousand, five hundred thirty-one".