13503081 has 4 divisors (see below), whose sum is σ = 18004112. Its totient is φ = 9002052.

The previous prime is 13503071. The next prime is 13503089. The reversal of 13503081 is 18030531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13503081 - 2⁷ = 13502953 is a prime.

It is a super-2 number, since 2×13503081² = 364666392985122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13503089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2250511 + ... + 2250516.

It is an arithmetic number, because the mean of its divisors is an integer number (4501028).

Almost surely, 2^13503081 is an apocalyptic number.

It is an amenable number.

13503081 is a deficient number, since it is larger than the sum of its proper divisors (4501031).

13503081 is an equidigital number, since it uses as much as digits as its factorization.

13503081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501030.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13503081 is about 3674.6538612501. The cubic root of 13503081 is about 238.1282704272.

The spelling of 13503081 in words is "thirteen million, five hundred three thousand, eighty-one".