13531243 has 8 divisors (see below), whose sum is σ = 14829120. Its totient is φ = 12244680.

The previous prime is 13531229. The next prime is 13531277. The reversal of 13531243 is 34213531.

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

It is a cyclic number.

It is not a de Polignac number, because 13531243 - 2¹⁷ = 13400171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531043) 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, 213 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (1853640).

Almost surely, 2^13531243 is an apocalyptic number.

13531243 is a deficient number, since it is larger than the sum of its proper divisors (1297877).

13531243 is a wasteful number, since it uses less digits than its factorization.

13531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657.

The product of its digits is 1080, while the sum is 22.

The square root of 13531243 is about 3678.4837909117. The cubic root of 13531243 is about 238.2937020948.

Adding to 13531243 its reverse (34213531), we get a palindrome (47744774).

The spelling of 13531243 in words is "thirteen million, five hundred thirty-one thousand, two hundred forty-three".