13154221 has 4 divisors (see below), whose sum is σ = 13169632. Its totient is φ = 13138812.

The previous prime is 13154201. The next prime is 13154231. The reversal of 13154221 is 12245131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13154221 - 2⁵ = 13154189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13154201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6345 + ... + 8158.

It is an arithmetic number, because the mean of its divisors is an integer number (3292408).

Almost surely, 2^13154221 is an apocalyptic number.

It is an amenable number.

13154221 is a deficient number, since it is larger than the sum of its proper divisors (15411).

13154221 is an equidigital number, since it uses as much as digits as its factorization.

13154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15410.

The product of its digits is 240, while the sum is 19.

The square root of 13154221 is about 3626.8748255213. The cubic root of 13154221 is about 236.0596241670.

Adding to 13154221 its reverse (12245131), we get a palindrome (25399352).

The spelling of 13154221 in words is "thirteen million, one hundred fifty-four thousand, two hundred twenty-one".