63143321 has 18 divisors (see below), whose sum is σ = 69666282. Its totient is φ = 57185280.

The previous prime is 63143309. The next prime is 63143341. The reversal of 63143321 is 12334136.

It can be written as a sum of positive squares in 9 ways, for example, as 5929225 + 57214096 = 2435^2 + 7564^2 .

It is not a de Polignac number, because 63143321 - 2¹⁰ = 63142297 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63143341) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 864941 + ... + 865013.

It is an arithmetic number, because the mean of its divisors is an integer number (3870349).

Almost surely, 2^63143321 is an apocalyptic number.

It is an amenable number.

63143321 is a deficient number, since it is larger than the sum of its proper divisors (6522961).

63143321 is an equidigital number, since it uses as much as digits as its factorization.

63143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 131 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 63143321 is about 7946.2771786542. The cubic root of 63143321 is about 398.2072290180.

Adding to 63143321 its reverse (12334136), we get a palindrome (75477457).

The spelling of 63143321 in words is "sixty-three million, one hundred forty-three thousand, three hundred twenty-one".