402221473 has 2 divisors, whose sum is σ = 402221474. Its totient is φ = 402221472.

The previous prime is 402221429. The next prime is 402221531. The reversal of 402221473 is 374122204.

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., 210482064 + 191739409 = 14508^2 + 13847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402221473 is a prime.

It is a super-2 number, since 2×402221473² = 323564226684579458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402221423) 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, 201110736 + 201110737.

It is an arithmetic number, because the mean of its divisors is an integer number (201110737).

Almost surely, 2^402221473 is an apocalyptic number.

It is an amenable number.

402221473 is a deficient number, since it is larger than the sum of its proper divisors (1).

402221473 is an equidigital number, since it uses as much as digits as its factorization.

402221473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 402221473 is about 20055.4599299044. The cubic root of 402221473 is about 738.1677785073.

Adding to 402221473 its reverse (374122204), we get a palindrome (776343677).

The spelling of 402221473 in words is "four hundred two million, two hundred twenty-one thousand, four hundred seventy-three".