343125521 has 4 divisors (see below), whose sum is σ = 350426112. Its totient is φ = 335824932.

The previous prime is 343125499. The next prime is 343125529. The reversal of 343125521 is 125521343.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343125521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (343125529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650225 + ... + 3650318.

It is an arithmetic number, because the mean of its divisors is an integer number (87606528).

Almost surely, 2^343125521 is an apocalyptic number.

It is an amenable number.

343125521 is a deficient number, since it is larger than the sum of its proper divisors (7300591).

343125521 is an equidigital number, since it uses as much as digits as its factorization.

343125521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300590.

The product of its digits is 3600, while the sum is 26.

The square root of 343125521 is about 18523.6476159530. The cubic root of 343125521 is about 700.0853780215.

Adding to 343125521 its reverse (125521343), we get a palindrome (468646864).

The spelling of 343125521 in words is "three hundred forty-three million, one hundred twenty-five thousand, five hundred twenty-one".