6350421221 has 4 divisors (see below), whose sum is σ = 6350963244. Its totient is φ = 6349879200.

The previous prime is 6350421211. The next prime is 6350421223. The reversal of 6350421221 is 1221240536.

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 4081804321 + 2268616900 = 63889^2 + 47630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6350421221 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 (6350421223) 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 3 ways as a sum of consecutive naturals, for example, 253040 + ... + 277001.

It is an arithmetic number, because the mean of its divisors is an integer number (1587740811).

Almost surely, 2^6350421221 is an apocalyptic number.

It is an amenable number.

6350421221 is a deficient number, since it is larger than the sum of its proper divisors (542023).

6350421221 is a wasteful number, since it uses less digits than its factorization.

6350421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542022.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6350421221 is about 79689.5301843348. The cubic root of 6350421221 is about 1851.8288436299.

Adding to 6350421221 its reverse (1221240536), we get a palindrome (7571661757).

It can be divided in two parts, 6350421 and 221, that multiplied together give a palindrome (1403443041).

The spelling of 6350421221 in words is "six billion, three hundred fifty million, four hundred twenty-one thousand, two hundred twenty-one".