6354221 has 4 divisors (see below), whose sum is σ = 6509244. Its totient is φ = 6199200.

The previous prime is 6354217. The next prime is 6354251. The reversal of 6354221 is 1224536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1562500 + 4791721 = 1250^2 + 2189^2 .

It is not a de Polignac number, because 6354221 - 2² = 6354217 is a prime.

It is a super-2 number, since 2×6354221² = 80752249033682, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6354251) 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, 77450 + ... + 77531.

It is an arithmetic number, because the mean of its divisors is an integer number (1627311).

Almost surely, 2^6354221 is an apocalyptic number.

It is an amenable number.

6354221 is a deficient number, since it is larger than the sum of its proper divisors (155023).

6354221 is a wasteful number, since it uses less digits than its factorization.

6354221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155022.

The product of its digits is 1440, while the sum is 23.

The square root of 6354221 is about 2520.7580209136. The cubic root of 6354221 is about 185.2198117685.

Adding to 6354221 its reverse (1224536), we get a palindrome (7578757).

The spelling of 6354221 in words is "six million, three hundred fifty-four thousand, two hundred twenty-one".