402221273 has 2 divisors, whose sum is σ = 402221274. Its totient is φ = 402221272.

The previous prime is 402221257. The next prime is 402221291. The reversal of 402221273 is 372122204.

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., 317801929 + 84419344 = 17827^2 + 9188^2 .

It is a cyclic number.

It is not a de Polignac number, because 402221273 - 2⁴ = 402221257 is a prime.

It is not a weakly prime, because it can be changed into another prime (402221473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201110636 + 201110637.

It is an arithmetic number, because the mean of its divisors is an integer number (201110637).

Almost surely, 2^402221273 is an apocalyptic number.

It is an amenable number.

402221273 is a deficient number, since it is larger than the sum of its proper divisors (1).

402221273 is an equidigital number, since it uses as much as digits as its factorization.

402221273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 402221273 is about 20055.4549437304. The cubic root of 402221273 is about 738.1676561588.

Adding to 402221273 its reverse (372122204), we get a palindrome (774343477).

The spelling of 402221273 in words is "four hundred two million, two hundred twenty-one thousand, two hundred seventy-three".