13531433 has 2 divisors, whose sum is σ = 13531434. Its totient is φ = 13531432.

The previous prime is 13531409. The next prime is 13531451. The reversal of 13531433 is 33413531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8369449 + 5161984 = 2893^2 + 2272^2 .

It is an emirp because it is prime and its reverse (33413531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13531433 - 2¹² = 13527337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13531399 and 13531408.

It is not a weakly prime, because it can be changed into another prime (13531493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765716 + 6765717.

It is an arithmetic number, because the mean of its divisors is an integer number (6765717).

Almost surely, 2^13531433 is an apocalyptic number.

It is an amenable number.

13531433 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531433 is an equidigital number, since it uses as much as digits as its factorization.

13531433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 23.

The square root of 13531433 is about 3678.5096166790. The cubic root of 13531433 is about 238.2948174294.

Adding to 13531433 its reverse (33413531), we get a palindrome (46944964).

The spelling of 13531433 in words is "thirteen million, five hundred thirty-one thousand, four hundred thirty-three".