343172123520 has 128 divisors (see below), whose sum is σ = 1098401467680. Its totient is φ = 91132723200.

The previous prime is 343172123519. The next prime is 343172123563. The reversal of 343172123520 is 25321271343.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×343172123520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91900 + ... + 833540.

Almost surely, 2^343172123520 is an apocalyptic number.

343172123520 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 343172123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549200733840).

343172123520 is an abundant number, since it is smaller than the sum of its proper divisors (755229344160).

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

343172123520 is a wasteful number, since it uses less digits than its factorization.

343172123520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741904 (or 741892 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 343172123520 its reverse (25321271343), we get a palindrome (368493394863).

The spelling of 343172123520 in words is "three hundred forty-three billion, one hundred seventy-two million, one hundred twenty-three thousand, five hundred twenty".