6330172221 has 16 divisors (see below), whose sum is σ = 9871614400. Its totient is φ = 3998003184.

The previous prime is 6330172213. The next prime is 6330172231. The reversal of 6330172221 is 1222710336.

6330172221 is a `hidden beast` number, since 633 + 0 + 1 + 7 + 2 + 2 + 21 = 666.

It is not a de Polignac number, because 6330172221 - 2³ = 6330172213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6330172231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6169246 + ... + 6170271.

It is an arithmetic number, because the mean of its divisors is an integer number (616975900).

Almost surely, 2^6330172221 is an apocalyptic number.

It is an amenable number.

6330172221 is a deficient number, since it is larger than the sum of its proper divisors (3541442179).

6330172221 is a wasteful number, since it uses less digits than its factorization.

6330172221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12339545 (or 12339539 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 6330172221 is about 79562.3794327445. The cubic root of 6330172221 is about 1849.8584962136.

Adding to 6330172221 its reverse (1222710336), we get a palindrome (7552882557).

The spelling of 6330172221 in words is "six billion, three hundred thirty million, one hundred seventy-two thousand, two hundred twenty-one".