2321563381 has 2 divisors, whose sum is σ = 2321563382. Its totient is φ = 2321563380.

The previous prime is 2321563379. The next prime is 2321563411. The reversal of 2321563381 is 1833651232.

2321563381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1769548356 + 552015025 = 42066^2 + 23495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321563381 - 2¹ = 2321563379 is a prime.

It is a super-2 number, since 2×2321563381² = 10779313064000302322, which contains 22 as substring.

Together with 2321563379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321563481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160781690 + 1160781691.

It is an arithmetic number, because the mean of its divisors is an integer number (1160781691).

Almost surely, 2^2321563381 is an apocalyptic number.

It is an amenable number.

2321563381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321563381 is an equidigital number, since it uses as much as digits as its factorization.

2321563381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 2321563381 is about 48182.6045476996. The cubic root of 2321563381 is about 1324.1184844586.

The spelling of 2321563381 in words is "two billion, three hundred twenty-one million, five hundred sixty-three thousand, three hundred eighty-one".