13545431 has 4 divisors (see below), whose sum is σ = 13554912. Its totient is φ = 13535952.

The previous prime is 13545401. The next prime is 13545437. The reversal of 13545431 is 13454531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13454531 = 17 ⋅791443.

It is a cyclic number.

It is not a de Polignac number, because 13545431 - 2¹⁰ = 13544407 is a prime.

It is a super-2 number, since 2×13545431² = 366957401951522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13545431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13545437) 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 in 3 ways as a sum of consecutive naturals, for example, 2111 + ... + 5616.

It is an arithmetic number, because the mean of its divisors is an integer number (3388728).

Almost surely, 2^13545431 is an apocalyptic number.

13545431 is a deficient number, since it is larger than the sum of its proper divisors (9481).

13545431 is an equidigital number, since it uses as much as digits as its factorization.

13545431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480.

The product of its digits is 3600, while the sum is 26.

The square root of 13545431 is about 3680.4117976118. The cubic root of 13545431 is about 238.3769595374.

Adding to 13545431 its reverse (13454531), we get a palindrome (26999962).

The spelling of 13545431 in words is "thirteen million, five hundred forty-five thousand, four hundred thirty-one".