343131522421 has 8 divisors (see below), whose sum is σ = 351286009184. Its totient is φ = 334984975920.

The previous prime is 343131522403. The next prime is 343131522479. The reversal of 343131522421 is 124225131343.

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 343131522421 - 2¹⁷ = 343131391349 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 (343131522401) 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, 1897566 + ... + 2070511.

It is an arithmetic number, because the mean of its divisors is an integer number (43910751148).

Almost surely, 2^343131522421 is an apocalyptic number.

It is an amenable number.

343131522421 is a deficient number, since it is larger than the sum of its proper divisors (8154486763).

343131522421 is a wasteful number, since it uses less digits than its factorization.

343131522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970131.

The product of its digits is 17280, while the sum is 31.

Adding to 343131522421 its reverse (124225131343), we get a palindrome (467356653764).

The spelling of 343131522421 in words is "three hundred forty-three billion, one hundred thirty-one million, five hundred twenty-two thousand, four hundred twenty-one".