344130021 has 6 divisors (see below), whose sum is σ = 497076710. Its totient is φ = 229420008.

The previous prime is 344129987. The next prime is 344130029. The reversal of 344130021 is 120031443.

344130021 is a `hidden beast` number, since 344 + 1 + 300 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 298080225 + 46049796 = 17265^2 + 6786^2 .

It is not a de Polignac number, because 344130021 - 2⁷ = 344129893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 344129976 and 344130003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344130029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19118326 + ... + 19118343.

Almost surely, 2^344130021 is an apocalyptic number.

It is an amenable number.

344130021 is a deficient number, since it is larger than the sum of its proper divisors (152946689).

344130021 is a wasteful number, since it uses less digits than its factorization.

344130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38236675 (or 38236672 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 344130021 is about 18550.7417910983. The cubic root of 344130021 is about 700.7678791202.

Adding to 344130021 its reverse (120031443), we get a palindrome (464161464).

The spelling of 344130021 in words is "three hundred forty-four million, one hundred thirty thousand, twenty-one".