6454010221 has 4 divisors (see below), whose sum is σ = 6459314652. Its totient is φ = 6448705792.

The previous prime is 6454010209. The next prime is 6454010239. The reversal of 6454010221 is 1220104546.

It is a happy number.

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 2387397321 + 4066612900 = 48861^2 + 63770^2 .

It is a cyclic number.

It is not a de Polignac number, because 6454010221 - 2¹⁹ = 6453485933 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 (6454710221) 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 3 ways as a sum of consecutive naturals, for example, 2650390 + ... + 2652823.

It is an arithmetic number, because the mean of its divisors is an integer number (1614828663).

Almost surely, 2^6454010221 is an apocalyptic number.

It is an amenable number.

6454010221 is a deficient number, since it is larger than the sum of its proper divisors (5304431).

6454010221 is a wasteful number, since it uses less digits than its factorization.

6454010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304430.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 6454010221 is about 80336.8546869990. The cubic root of 6454010221 is about 1861.8436859099.

Adding to 6454010221 its reverse (1220104546), we get a palindrome (7674114767).

The spelling of 6454010221 in words is "six billion, four hundred fifty-four million, ten thousand, two hundred twenty-one".