1382445221 has 2 divisors, whose sum is σ = 1382445222. Its totient is φ = 1382445220.

The previous prime is 1382445191. The next prime is 1382445241. The reversal of 1382445221 is 1225442831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700660900 + 681784321 = 26470^2 + 26111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382445221 - 2⁶ = 1382445157 is a prime.

It is a super-2 number, since 2×1382445221² = 3822309578131477682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1382445241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691222610 + 691222611.

It is an arithmetic number, because the mean of its divisors is an integer number (691222611).

Almost surely, 2^1382445221 is an apocalyptic number.

It is an amenable number.

1382445221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382445221 is an equidigital number, since it uses as much as digits as its factorization.

1382445221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 32.

The square root of 1382445221 is about 37181.2482442427. The cubic root of 1382445221 is about 1113.9934667685.

The spelling of 1382445221 in words is "one billion, three hundred eighty-two million, four hundred forty-five thousand, two hundred twenty-one".