6631004220331 has 4 divisors (see below), whose sum is σ = 6631721793064. Its totient is φ = 6630286647600.

The previous prime is 6631004220329. The next prime is 6631004220377. The reversal of 6631004220331 is 1330224001366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6631004220331 - 2¹ = 6631004220329 is a prime.

It is a super-2 number, since 2×6631004220331² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6631004220293 and 6631004220302.

It is not an unprimeable number, because it can be changed into a prime (6631004020331) 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, 358772505 + ... + 358790986.

It is an arithmetic number, because the mean of its divisors is an integer number (1657930448266).

Almost surely, 2^{6631004220331} is an apocalyptic number.

6631004220331 is a deficient number, since it is larger than the sum of its proper divisors (717572733).

6631004220331 is an equidigital number, since it uses as much as digits as its factorization.

6631004220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717572732.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 6631004220331 its reverse (1330224001366), we get a palindrome (7961228221697).

The spelling of 6631004220331 in words is "six trillion, six hundred thirty-one billion, four million, two hundred twenty thousand, three hundred thirty-one".