13520433 has 8 divisors (see below), whose sum is σ = 18608896. Its totient is φ = 8722800.

The previous prime is 13520431. The next prime is 13520449. The reversal of 13520433 is 33402531.

13520433 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 13520433 - 2¹ = 13520431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520431) 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, 72598 + ... + 72783.

It is an arithmetic number, because the mean of its divisors is an integer number (2326112).

Almost surely, 2^13520433 is an apocalyptic number.

It is an amenable number.

13520433 is a deficient number, since it is larger than the sum of its proper divisors (5088463).

13520433 is a wasteful number, since it uses less digits than its factorization.

13520433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145415.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 13520433 is about 3677.0141419364. The cubic root of 13520433 is about 238.2302282219.

Adding to 13520433 its reverse (33402531), we get a palindrome (46922964).

The spelling of 13520433 in words is "thirteen million, five hundred twenty thousand, four hundred thirty-three".