2321986981 has 2 divisors, whose sum is σ = 2321986982. Its totient is φ = 2321986980.

The previous prime is 2321986967. The next prime is 2321986999. The reversal of 2321986981 is 1896891232.

2321986981 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., 2120602500 + 201384481 = 46050^2 + 14191^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321986981 - 2⁷ = 2321986853 is a prime.

It is a super-2 number, since 2×2321986981² = 10783247079866988722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321986481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160993490 + 1160993491.

It is an arithmetic number, because the mean of its divisors is an integer number (1160993491).

Almost surely, 2^2321986981 is an apocalyptic number.

It is an amenable number.

2321986981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321986981 is an equidigital number, since it uses as much as digits as its factorization.

2321986981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 2321986981 is about 48187.0001245149. Note that the first 3 decimals coincide. The cubic root of 2321986981 is about 1324.1990138817.

The spelling of 2321986981 in words is "two billion, three hundred twenty-one million, nine hundred eighty-six thousand, nine hundred eighty-one".