2631321305 has 16 divisors (see below), whose sum is σ = 3343697280. Its totient is φ = 1982310912.

The previous prime is 2631321289. The next prime is 2631321313. The reversal of 2631321305 is 5031231362.

It is a cyclic number.

It is not a de Polignac number, because 2631321305 - 2⁴ = 2631321289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67064 + ... + 98793.

It is an arithmetic number, because the mean of its divisors is an integer number (208981080).

Almost surely, 2^2631321305 is an apocalyptic number.

It is an amenable number.

2631321305 is a deficient number, since it is larger than the sum of its proper divisors (712375975).

2631321305 is a wasteful number, since it uses less digits than its factorization.

2631321305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166048.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 2631321305 is about 51296.4063556113. The cubic root of 2631321305 is about 1380.5685022037.

Adding to 2631321305 its reverse (5031231362), we get a palindrome (7662552667).

The spelling of 2631321305 in words is "two billion, six hundred thirty-one million, three hundred twenty-one thousand, three hundred five".