13542221 has 8 divisors (see below), whose sum is σ = 16883904. Its totient is φ = 10552320.

The previous prime is 13542209. The next prime is 13542227. The reversal of 13542221 is 12224531.

13542221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13542221 is a prime.

It is a super-2 number, since 2×13542221² = 366783499225682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13542193 and 13542202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13542227) 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 7 ways as a sum of consecutive naturals, for example, 87860 + ... + 88013.

It is an arithmetic number, because the mean of its divisors is an integer number (2110488).

Almost surely, 2^13542221 is an apocalyptic number.

13542221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13542221 is a deficient number, since it is larger than the sum of its proper divisors (3341683).

13542221 is a wasteful number, since it uses less digits than its factorization.

13542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175891.

The product of its digits is 480, while the sum is 20.

The square root of 13542221 is about 3679.9756792675. The cubic root of 13542221 is about 238.3581278371.

Adding to 13542221 its reverse (12224531), we get a palindrome (25766752).

The spelling of 13542221 in words is "thirteen million, five hundred forty-two thousand, two hundred twenty-one".