13281330 has 32 divisors (see below), whose sum is σ = 32905728. Its totient is φ = 3427200.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281330 is 3318231.

It is a happy number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13281297 and 13281306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6211 + ... + 8070.

It is an arithmetic number, because the mean of its divisors is an integer number (1028304).

Almost surely, 2^13281330 is an apocalyptic number.

13281330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13281330 is an abundant number, since it is smaller than the sum of its proper divisors (19624398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13281330 is a wasteful number, since it uses less digits than its factorization.

13281330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13281330 is about 3644.3559101712. The cubic root of 13281330 is about 236.8175347870.

Adding to 13281330 its reverse (3318231), we get a palindrome (16599561).

The spelling of 13281330 in words is "thirteen million, two hundred eighty-one thousand, three hundred thirty".