13544431 has 2 divisors, whose sum is σ = 13544432. Its totient is φ = 13544430.

The previous prime is 13544417. The next prime is 13544477. The reversal of 13544431 is 13444531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13544431 - 2¹³ = 13536239 is a prime.

It is a super-2 number, since 2×13544431² = 366903222227522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13544396 and 13544405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13544731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772215 + 6772216.

It is an arithmetic number, because the mean of its divisors is an integer number (6772216).

Almost surely, 2^13544431 is an apocalyptic number.

13544431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13544431 is an equidigital number, since it uses as much as digits as its factorization.

13544431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 13544431 is about 3680.2759407414. The cubic root of 13544431 is about 238.3710932832.

Adding to 13544431 its reverse (13444531), we get a palindrome (26988962).

The spelling of 13544431 in words is "thirteen million, five hundred forty-four thousand, four hundred thirty-one".