6322001981 has 2 divisors, whose sum is σ = 6322001982. Its totient is φ = 6322001980.

The previous prime is 6322001971. The next prime is 6322001989. The reversal of 6322001981 is 1891002236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5061041881 + 1260960100 = 71141^2 + 35510^2 .

It is a cyclic number.

It is not a de Polignac number, because 6322001981 - 2²² = 6317807677 is a prime.

It is a super-2 number, since 2×6322001981² = 79935418095535848722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6322001989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161000990 + 3161000991.

It is an arithmetic number, because the mean of its divisors is an integer number (3161000991).

Almost surely, 2^6322001981 is an apocalyptic number.

It is an amenable number.

6322001981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6322001981 is an equidigital number, since it uses as much as digits as its factorization.

6322001981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 6322001981 is about 79511.0179849309. The cubic root of 6322001981 is about 1849.0622938153.

The spelling of 6322001981 in words is "six billion, three hundred twenty-two million, one thousand, nine hundred eighty-one".