13311510981 has 32 divisors (see below), whose sum is σ = 18807951360. Its totient is φ = 8357304384.

The previous prime is 13311510977. The next prime is 13311510983. The reversal of 13311510981 is 18901511331.

It is a happy number.

13311510981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13311510981 - 2² = 13311510977 is a prime.

It is a super-2 number, since 2×13311510981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311510983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2029950 + ... + 2036496.

It is an arithmetic number, because the mean of its divisors is an integer number (587748480).

Almost surely, 2^13311510981 is an apocalyptic number.

It is an amenable number.

13311510981 is a deficient number, since it is larger than the sum of its proper divisors (5496440379).

13311510981 is a wasteful number, since it uses less digits than its factorization.

13311510981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its (nonzero) digits is 3240, while the sum is 33.

The spelling of 13311510981 in words is "thirteen billion, three hundred eleven million, five hundred ten thousand, nine hundred eighty-one".