343131401 has 4 divisors (see below), whose sum is σ = 346986900. Its totient is φ = 339275904.

The previous prime is 343131391. The next prime is 343131407. The reversal of 343131401 is 104131343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196140025 + 146991376 = 14005^2 + 12124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343131401 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 (343131407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1927616 + ... + 1927793.

It is an arithmetic number, because the mean of its divisors is an integer number (86746725).

Almost surely, 2^343131401 is an apocalyptic number.

It is an amenable number.

343131401 is a deficient number, since it is larger than the sum of its proper divisors (3855499).

343131401 is an equidigital number, since it uses as much as digits as its factorization.

343131401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855498.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 343131401 is about 18523.8063313132. The cubic root of 343131401 is about 700.0893770231.

Adding to 343131401 its reverse (104131343), we get a palindrome (447262744).

The spelling of 343131401 in words is "three hundred forty-three million, one hundred thirty-one thousand, four hundred one".