13211442 has 48 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 4215456.

The previous prime is 13211437. The next prime is 13211477. The reversal of 13211442 is 24411231.

13211442 is a `hidden beast` number, since 13 + 211 + 442 = 666.

13211442 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55159 + ... + 55397.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^13211442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13211442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14938560).

13211442 is an abundant number, since it is smaller than the sum of its proper divisors (16665678).

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

13211442 is a wasteful number, since it uses less digits than its factorization.

13211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 364 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 13211442 is about 3634.7547372553. The cubic root of 13211442 is about 236.4014163296.

Adding to 13211442 its reverse (24411231), we get a palindrome (37622673).

The spelling of 13211442 in words is "thirteen million, two hundred eleven thousand, four hundred forty-two".