402221361 has 8 divisors (see below), whose sum is σ = 539103744. Its totient is φ = 266743280.

The previous prime is 402221359. The next prime is 402221363. The reversal of 402221361 is 163122204.

It is an interprime number because it is at equal distance from previous prime (402221359) and next prime (402221363).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402221361 - 2¹ = 402221359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402221363) 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 in 7 ways as a sum of consecutive naturals, for example, 350406 + ... + 351551.

It is an arithmetic number, because the mean of its divisors is an integer number (67387968).

Almost surely, 2^402221361 is an apocalyptic number.

It is an amenable number.

402221361 is a deficient number, since it is larger than the sum of its proper divisors (136882383).

402221361 is a wasteful number, since it uses less digits than its factorization.

402221361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702151.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 402221361 is about 20055.4571376471. The cubic root of 402221361 is about 738.1677099922.

Adding to 402221361 its reverse (163122204), we get a palindrome (565343565).

The spelling of 402221361 in words is "four hundred two million, two hundred twenty-one thousand, three hundred sixty-one".