402224401 has 2 divisors, whose sum is σ = 402224402. Its totient is φ = 402224400.

The previous prime is 402224399. The next prime is 402224441. The reversal of 402224401 is 104422204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347449600 + 54774801 = 18640^2 + 7401^2 .

It is a cyclic number.

It is not a de Polignac number, because 402224401 - 2¹ = 402224399 is a prime.

Together with 402224399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402224441) 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, 201112200 + 201112201.

It is an arithmetic number, because the mean of its divisors is an integer number (201112201).

Almost surely, 2^402224401 is an apocalyptic number.

It is an amenable number.

402224401 is a deficient number, since it is larger than the sum of its proper divisors (1).

402224401 is an equidigital number, since it uses as much as digits as its factorization.

402224401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402224401 is about 20055.5329273495. The cubic root of 402224401 is about 738.1695696847.

Adding to 402224401 its reverse (104422204), we get a palindrome (506646605).

The spelling of 402224401 in words is "four hundred two million, two hundred twenty-four thousand, four hundred one".