1604822281 has 2 divisors, whose sum is σ = 1604822282. Its totient is φ = 1604822280.

The previous prime is 1604822269. The next prime is 1604822293. The reversal of 1604822281 is 1822284061.

It is a balanced prime because it is at equal distance from previous prime (1604822269) and next prime (1604822293).

It can be written as a sum of positive squares in only one way, i.e., 1367816256 + 237006025 = 36984^2 + 15395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604822281 - 2⁵ = 1604822249 is a prime.

It is a super-2 number, since 2×1604822281² = 5150909107188085922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1604822381) 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, 802411140 + 802411141.

It is an arithmetic number, because the mean of its divisors is an integer number (802411141).

Almost surely, 2^1604822281 is an apocalyptic number.

It is an amenable number.

1604822281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604822281 is an equidigital number, since it uses as much as digits as its factorization.

1604822281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1604822281 is about 40060.2331620773. The cubic root of 1604822281 is about 1170.7809530324.

The spelling of 1604822281 in words is "one billion, six hundred four million, eight hundred twenty-two thousand, two hundred eighty-one".