382220921 has 2 divisors, whose sum is σ = 382220922. Its totient is φ = 382220920.

The previous prime is 382220879. The next prime is 382220947. The reversal of 382220921 is 129022283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374035600 + 8185321 = 19340^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 382220921 - 2⁶ = 382220857 is a prime.

It is not a weakly prime, because it can be changed into another prime (382220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191110460 + 191110461.

It is an arithmetic number, because the mean of its divisors is an integer number (191110461).

Almost surely, 2^382220921 is an apocalyptic number.

It is an amenable number.

382220921 is a deficient number, since it is larger than the sum of its proper divisors (1).

382220921 is an equidigital number, since it uses as much as digits as its factorization.

382220921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 382220921 is about 19550.4711196431. The cubic root of 382220921 is about 725.7239987581.

The spelling of 382220921 in words is "three hundred eighty-two million, two hundred twenty thousand, nine hundred twenty-one".