13330787281 has 16 divisors (see below), whose sum is σ = 15904502784. Its totient is φ = 10924833744.

The previous prime is 13330787233. The next prime is 13330787311. The reversal of 13330787281 is 18278703331.

It is a cyclic number.

It is not a de Polignac number, because 13330787281 - 2⁷ = 13330787153 is a prime.

It is a super-2 number, since 2×13330787281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13330781281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380406 + ... + 413968.

It is an arithmetic number, because the mean of its divisors is an integer number (994031424).

Almost surely, 2^13330787281 is an apocalyptic number.

It is an amenable number.

13330787281 is a deficient number, since it is larger than the sum of its proper divisors (2573715503).

13330787281 is a wasteful number, since it uses less digits than its factorization.

13330787281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36060.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 13330787281 in words is "thirteen billion, three hundred thirty million, seven hundred eighty-seven thousand, two hundred eighty-one".