13251481 has 4 divisors (see below), whose sum is σ = 13294132. Its totient is φ = 13208832.

The previous prime is 13251479. The next prime is 13251499. The reversal of 13251481 is 18415231.

13251481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18415231 = 379 ⋅48589.

It can be written as a sum of positive squares in 2 ways, for example, as 4347225 + 8904256 = 2085^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 13251481 - 2¹ = 13251479 is a prime.

It is a super-2 number, since 2×13251481² = 351203497386722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13251421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20856 + ... + 21481.

It is an arithmetic number, because the mean of its divisors is an integer number (3323533).

Almost surely, 2^13251481 is an apocalyptic number.

It is an amenable number.

13251481 is a deficient number, since it is larger than the sum of its proper divisors (42651).

13251481 is an equidigital number, since it uses as much as digits as its factorization.

13251481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42650.

The product of its digits is 960, while the sum is 25.

The square root of 13251481 is about 3640.2583699512. The cubic root of 13251481 is about 236.6399906013.

The spelling of 13251481 in words is "thirteen million, two hundred fifty-one thousand, four hundred eighty-one".