6221523421 has 8 divisors (see below), whose sum is σ = 6260162688. Its totient is φ = 6183000000.

The previous prime is 6221523409. The next prime is 6221523431. The reversal of 6221523421 is 1243251226.

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 6221523421 - 2⁷ = 6221523293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6221523421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221523401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80046 + ... + 137296.

It is an arithmetic number, because the mean of its divisors is an integer number (782520336).

Almost surely, 2^6221523421 is an apocalyptic number.

It is an amenable number.

6221523421 is a deficient number, since it is larger than the sum of its proper divisors (38639267).

6221523421 is a wasteful number, since it uses less digits than its factorization.

6221523421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57923.

The product of its digits is 5760, while the sum is 28.

The square root of 6221523421 is about 78876.6341890930. The cubic root of 6221523421 is about 1839.2139266910.

Adding to 6221523421 its reverse (1243251226), we get a palindrome (7464774647).

The spelling of 6221523421 in words is "six billion, two hundred twenty-one million, five hundred twenty-three thousand, four hundred twenty-one".