622283821 has 2 divisors, whose sum is σ = 622283822. Its totient is φ = 622283820.

The previous prime is 622283813. The next prime is 622283867. The reversal of 622283821 is 128382226.

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., 621255625 + 1028196 = 24925^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 622283821 - 2³ = 622283813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622283621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311141910 + 311141911.

It is an arithmetic number, because the mean of its divisors is an integer number (311141911).

Almost surely, 2^622283821 is an apocalyptic number.

It is an amenable number.

622283821 is a deficient number, since it is larger than the sum of its proper divisors (1).

622283821 is an equidigital number, since it uses as much as digits as its factorization.

622283821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 34.

The square root of 622283821 is about 24945.6172703744. The cubic root of 622283821 is about 853.7476145780.

It can be divided in two parts, 62228 and 3821, that added together give a square (66049 = 257²).

The spelling of 622283821 in words is "six hundred twenty-two million, two hundred eighty-three thousand, eight hundred twenty-one".