13217481 has 12 divisors (see below), whose sum is σ = 19498752. Its totient is φ = 8623896.

The previous prime is 13217467. The next prime is 13217509. The reversal of 13217481 is 18471231.

It is not a de Polignac number, because 13217481 - 2⁹ = 13216969 is a prime.

It is a super-2 number, since 2×13217481² = 349403607970722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13217441) 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 11 ways as a sum of consecutive naturals, for example, 15201 + ... + 16046.

It is an arithmetic number, because the mean of its divisors is an integer number (1624896).

Almost surely, 2^13217481 is an apocalyptic number.

It is an amenable number.

13217481 is a deficient number, since it is larger than the sum of its proper divisors (6281271).

13217481 is a wasteful number, since it uses less digits than its factorization.

13217481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31300 (or 31297 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13217481 is about 3635.5853723988. The cubic root of 13217481 is about 236.4374308360.

The spelling of 13217481 in words is "thirteen million, two hundred seventeen thousand, four hundred eighty-one".