2331763981 has 2 divisors, whose sum is σ = 2331763982. Its totient is φ = 2331763980.

The previous prime is 2331763933. The next prime is 2331764003. The reversal of 2331763981 is 1893671332.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1766941225 + 564822756 = 42035^2 + 23766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2331763981 is a prime.

It is a super-2 number, since 2×2331763981² = 10874246526177936722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331769981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165881990 + 1165881991.

It is an arithmetic number, because the mean of its divisors is an integer number (1165881991).

Almost surely, 2^2331763981 is an apocalyptic number.

It is an amenable number.

2331763981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331763981 is an equidigital number, since it uses as much as digits as its factorization.

2331763981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 2331763981 is about 48288.3420817075. The cubic root of 2331763981 is about 1326.0549767645.

The spelling of 2331763981 in words is "two billion, three hundred thirty-one million, seven hundred sixty-three thousand, nine hundred eighty-one".