13433281 has 8 divisors (see below), whose sum is σ = 14571144. Its totient is φ = 12334080.

The previous prime is 13433207. The next prime is 13433291. The reversal of 13433281 is 18233431.

It can be written as a sum of positive squares in 4 ways, for example, as 1461681 + 11971600 = 1209^2 + 3460^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13433281 - 2⁷ = 13433153 is a prime.

It is a super-2 number, since 2×13433281² = 360906076849922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13433201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8940 + ... + 10333.

It is an arithmetic number, because the mean of its divisors is an integer number (1821393).

Almost surely, 2^13433281 is an apocalyptic number.

It is an amenable number.

13433281 is a deficient number, since it is larger than the sum of its proper divisors (1137863).

13433281 is a wasteful number, since it uses less digits than its factorization.

13433281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19331.

The product of its digits is 1728, while the sum is 25.

The square root of 13433281 is about 3665.1440626529. The cubic root of 13433281 is about 237.7172512567.

It can be divided in two parts, 1343 and 3281, that added together give a square (4624 = 68²).

The spelling of 13433281 in words is "thirteen million, four hundred thirty-three thousand, two hundred eighty-one".