402022321 has 2 divisors, whose sum is σ = 402022322. Its totient is φ = 402022320.

The previous prime is 402022303. The next prime is 402022337. The reversal of 402022321 is 123220204.

It is an a-pointer prime, because the next prime (402022337) can be obtained adding 402022321 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392634225 + 9388096 = 19815^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 402022321 - 2⁵ = 402022289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402022295 and 402022304.

It is not a weakly prime, because it can be changed into another prime (402022301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201011160 + 201011161.

It is an arithmetic number, because the mean of its divisors is an integer number (201011161).

Almost surely, 2^402022321 is an apocalyptic number.

It is an amenable number.

402022321 is a deficient number, since it is larger than the sum of its proper divisors (1).

402022321 is an equidigital number, since it uses as much as digits as its factorization.

402022321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402022321 is about 20050.4942831841. The cubic root of 402022321 is about 738.0459286737.

Adding to 402022321 its reverse (123220204), we get a palindrome (525242525).

It can be divided in two parts, 40 and 2022321, that multiplied together give a triangular number (80892840 = T₁₂₇₁₉).

The spelling of 402022321 in words is "four hundred two million, twenty-two thousand, three hundred twenty-one".