343143320520 has 512 divisors, whose sum is σ = 1383879168000. Its totient is φ = 65736437760.

The previous prime is 343143320491. The next prime is 343143320537. The reversal of 343143320520 is 25023341343.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 151229946 + ... + 151232214.

It is an arithmetic number, because the mean of its divisors is an integer number (2702889000).

Almost surely, 2^343143320520 is an apocalyptic number.

343143320520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343143320520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691939584000).

343143320520 is an abundant number, since it is smaller than the sum of its proper divisors (1040735847480).

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

343143320520 is a wasteful number, since it uses less digits than its factorization.

343143320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573 (or 3569 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 343143320520 its reverse (25023341343), we get a palindrome (368166661863).

The spelling of 343143320520 in words is "three hundred forty-three billion, one hundred forty-three million, three hundred twenty thousand, five hundred twenty".