63622321 has 4 divisors (see below), whose sum is σ = 72711232. Its totient is φ = 54533412.

The previous prime is 63622309. The next prime is 63622333. The reversal of 63622321 is 12322636.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (63622309) and next prime (63622333).

It is a cyclic number.

It is not a de Polignac number, because 63622321 - 2⁵ = 63622289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63622121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4544445 + ... + 4544458.

It is an arithmetic number, because the mean of its divisors is an integer number (18177808).

Almost surely, 2^63622321 is an apocalyptic number.

It is an amenable number.

63622321 is a deficient number, since it is larger than the sum of its proper divisors (9088911).

63622321 is an equidigital number, since it uses as much as digits as its factorization.

63622321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088910.

The product of its digits is 2592, while the sum is 25.

The square root of 63622321 is about 7976.3601347983. The cubic root of 63622321 is about 399.2116158971.

Adding to 63622321 its reverse (12322636), we get a palindrome (75944957).

The spelling of 63622321 in words is "sixty-three million, six hundred twenty-two thousand, three hundred twenty-one".