2214965981 has 2 divisors, whose sum is σ = 2214965982. Its totient is φ = 2214965980.

The previous prime is 2214965969. The next prime is 2214965993. The reversal of 2214965981 is 1895694122.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2214965969) and next prime (2214965993).

It can be written as a sum of positive squares in only one way, i.e., 1181021956 + 1033944025 = 34366^2 + 32155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2214965981 is a prime.

It is a super-2 number, since 2×2214965981² = 9812148593974584722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2214965911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107482990 + 1107482991.

It is an arithmetic number, because the mean of its divisors is an integer number (1107482991).

Almost surely, 2^2214965981 is an apocalyptic number.

It is an amenable number.

2214965981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2214965981 is an equidigital number, since it uses as much as digits as its factorization.

2214965981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 2214965981 is about 47063.4250878535. The cubic root of 2214965981 is about 1303.5339704086.

The spelling of 2214965981 in words is "two billion, two hundred fourteen million, nine hundred sixty-five thousand, nine hundred eighty-one".