1382222981 has 2 divisors, whose sum is σ = 1382222982. Its totient is φ = 1382222980.

The previous prime is 1382222977. The next prime is 1382222993. The reversal of 1382222981 is 1892222831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1353504100 + 28718881 = 36790^2 + 5359^2 .

It is an emirp because it is prime and its reverse (1892222831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1382222981 - 2² = 1382222977 is a prime.

It is a super-2 number, since 2×1382222981² = 3821080738409052722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1382222921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691111490 + 691111491.

It is an arithmetic number, because the mean of its divisors is an integer number (691111491).

Almost surely, 2^1382222981 is an apocalyptic number.

It is an amenable number.

1382222981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382222981 is an equidigital number, since it uses as much as digits as its factorization.

1382222981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 1382222981 is about 37178.2595208544. The cubic root of 1382222981 is about 1113.9337688814.

The spelling of 1382222981 in words is "one billion, three hundred eighty-two million, two hundred twenty-two thousand, nine hundred eighty-one".