13573231 has 4 divisors (see below), whose sum is σ = 15512272. Its totient is φ = 11634192.

The previous prime is 13573207. The next prime is 13573249. The reversal of 13573231 is 13237531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13237531 = 1979 ⋅6689.

It is a cyclic number.

It is not a de Polignac number, because 13573231 - 2⁵ = 13573199 is a prime.

It is a super-2 number, since 2×13573231² = 368465199558722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13573196 and 13573205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13573291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969510 + ... + 969523.

It is an arithmetic number, because the mean of its divisors is an integer number (3878068).

Almost surely, 2^13573231 is an apocalyptic number.

13573231 is a deficient number, since it is larger than the sum of its proper divisors (1939041).

13573231 is an equidigital number, since it uses as much as digits as its factorization.

13573231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939040.

The product of its digits is 1890, while the sum is 25.

The square root of 13573231 is about 3684.1866130803. The cubic root of 13573231 is about 238.5399259545.

The spelling of 13573231 in words is "thirteen million, five hundred seventy-three thousand, two hundred thirty-one".