13288821 has 16 divisors (see below), whose sum is σ = 21807744. Its totient is φ = 7009344.

The previous prime is 13288813. The next prime is 13288823. The reversal of 13288821 is 12888231.

It is not a de Polignac number, because 13288821 - 2³ = 13288813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13288823) 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 15 ways as a sum of consecutive naturals, for example, 24066 + ... + 24611.

It is an arithmetic number, because the mean of its divisors is an integer number (1362984).

Almost surely, 2^13288821 is an apocalyptic number.

It is an amenable number.

13288821 is a deficient number, since it is larger than the sum of its proper divisors (8518923).

13288821 is a wasteful number, since it uses less digits than its factorization.

13288821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48700.

The product of its digits is 6144, while the sum is 33.

The square root of 13288821 is about 3645.3835189181. The cubic root of 13288821 is about 236.8620500761.

The spelling of 13288821 in words is "thirteen million, two hundred eighty-eight thousand, eight hundred twenty-one".