402221312340 has 24 divisors (see below), whose sum is σ = 1126219674720. Its totient is φ = 107259016608.

The previous prime is 402221312329. The next prime is 402221312357. The reversal of 402221312340 is 43213122204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 402221312340.

It is a congruent number.

It is an unprimeable number.

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, 3351844210 + ... + 3351844329.

It is an arithmetic number, because the mean of its divisors is an integer number (46925819780).

Almost surely, 2^402221312340 is an apocalyptic number.

It is an amenable number.

402221312340 is an abundant number, since it is smaller than the sum of its proper divisors (723998362380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402221312340 is a wasteful number, since it uses less digits than its factorization.

402221312340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703688551 (or 6703688549 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 402221312340 its reverse (43213122204), we get a palindrome (445434434544).

The spelling of 402221312340 in words is "four hundred two billion, two hundred twenty-one million, three hundred twelve thousand, three hundred forty".