13431533 has 2 divisors, whose sum is σ = 13431534. Its totient is φ = 13431532.

The previous prime is 13431521. The next prime is 13431541. The reversal of 13431533 is 33513431.

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., 11546404 + 1885129 = 3398^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 13431533 - 2¹⁶ = 13365997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13431499 and 13431508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13431503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6715766 + 6715767.

It is an arithmetic number, because the mean of its divisors is an integer number (6715767).

Almost surely, 2^13431533 is an apocalyptic number.

It is an amenable number.

13431533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13431533 is an equidigital number, since it uses as much as digits as its factorization.

13431533 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 13431533 is about 3664.9055922356. The cubic root of 13431533 is about 237.7069398572.

Adding to 13431533 its reverse (33513431), we get a palindrome (46944964).

The spelling of 13431533 in words is "thirteen million, four hundred thirty-one thousand, five hundred thirty-three".