5631358321 has 8 divisors (see below), whose sum is σ = 5696130600. Its totient is φ = 5566619520.

The previous prime is 5631358297. The next prime is 5631358331. The reversal of 5631358321 is 1238531365.

It can be written as a sum of positive squares in 4 ways, for example, as 78127921 + 5553230400 = 8839^2 + 74520^2 .

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 5631358321 - 2¹⁷ = 5631227249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5631358331) 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, 516951 + ... + 527731.

It is an arithmetic number, because the mean of its divisors is an integer number (712016325).

Almost surely, 2^5631358321 is an apocalyptic number.

It is an amenable number.

5631358321 is a deficient number, since it is larger than the sum of its proper divisors (64772279).

5631358321 is a wasteful number, since it uses less digits than its factorization.

5631358321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16739.

The product of its digits is 64800, while the sum is 37.

The square root of 5631358321 is about 75042.3768346925. The cubic root of 5631358321 is about 1779.1164997508.

Adding to 5631358321 its reverse (1238531365), we get a palindrome (6869889686).

The spelling of 5631358321 in words is "five billion, six hundred thirty-one million, three hundred fifty-eight thousand, three hundred twenty-one".