402434331344221 has 8 divisors (see below), whose sum is σ = 439667748069984. Its totient is φ = 365308994203920.

The previous prime is 402434331344203. The next prime is 402434331344299. The reversal of 402434331344221 is 122443133434204.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402434331344221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402434331344921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27019888575 + ... + 27019903468.

It is an arithmetic number, because the mean of its divisors is an integer number (54958468508748).

Almost surely, 2^{402434331344221} is an apocalyptic number.

It is an amenable number.

402434331344221 is a deficient number, since it is larger than the sum of its proper divisors (37233416725763).

402434331344221 is a wasteful number, since it uses less digits than its factorization.

402434331344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54039792731.

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 402434331344221 its reverse (122443133434204), we get a palindrome (524877464778425).

The spelling of 402434331344221 in words is "four hundred two trillion, four hundred thirty-four billion, three hundred thirty-one million, three hundred forty-four thousand, two hundred twenty-one".