6450221551 has 8 divisors (see below), whose sum is σ = 6567235200. Its totient is φ = 6333464280.

The previous prime is 6450221543. The next prime is 6450221563. The reversal of 6450221551 is 1551220546.

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

It is a cyclic number.

It is not a de Polignac number, because 6450221551 - 2³ = 6450221543 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 (6450221501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12955 + ... + 114316.

It is an arithmetic number, because the mean of its divisors is an integer number (820904400).

Almost surely, 2^6450221551 is an apocalyptic number.

6450221551 is a deficient number, since it is larger than the sum of its proper divisors (117013649).

6450221551 is a wasteful number, since it uses less digits than its factorization.

6450221551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128189.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 6450221551 is about 80313.2713254790. The cubic root of 6450221551 is about 1861.4792978885.

The spelling of 6450221551 in words is "six billion, four hundred fifty million, two hundred twenty-one thousand, five hundred fifty-one".