342316021 has 4 divisors (see below), whose sum is σ = 342446572. Its totient is φ = 342185472.

The previous prime is 342316003. The next prime is 342316031. The reversal of 342316021 is 120613243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120613243 = 179 ⋅673817.

It can be written as a sum of positive squares in 2 ways, for example, as 134235396 + 208080625 = 11586^2 + 14425^2 .

It is a cyclic number.

It is not a de Polignac number, because 342316021 - 2¹³ = 342307829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 342315983 and 342316001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342316031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61260 + ... + 66613.

It is an arithmetic number, because the mean of its divisors is an integer number (85611643).

Almost surely, 2^342316021 is an apocalyptic number.

It is an amenable number.

342316021 is a deficient number, since it is larger than the sum of its proper divisors (130551).

342316021 is a wasteful number, since it uses less digits than its factorization.

342316021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130550.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 342316021 is about 18501.7842653080. The cubic root of 342316021 is about 699.5343985395.

Adding to 342316021 its reverse (120613243), we get a palindrome (462929264).

The spelling of 342316021 in words is "three hundred forty-two million, three hundred sixteen thousand, twenty-one".