322400381 has 2 divisors, whose sum is σ = 322400382. Its totient is φ = 322400380.

The previous prime is 322400321. The next prime is 322400387. The reversal of 322400381 is 183004223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195049156 + 127351225 = 13966^2 + 11285^2 .

It is a cyclic number.

It is not a de Polignac number, because 322400381 - 2⁶ = 322400317 is a prime.

It is a super-2 number, since 2×322400381² = 207884011337890322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322400387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161200190 + 161200191.

It is an arithmetic number, because the mean of its divisors is an integer number (161200191).

Almost surely, 2^322400381 is an apocalyptic number.

It is an amenable number.

322400381 is a deficient number, since it is larger than the sum of its proper divisors (1).

322400381 is an equidigital number, since it uses as much as digits as its factorization.

322400381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 322400381 is about 17955.5111595298. The cubic root of 322400381 is about 685.6963675109.

The spelling of 322400381 in words is "three hundred twenty-two million, four hundred thousand, three hundred eighty-one".