331301213 has 4 divisors (see below), whose sum is σ = 331412508. Its totient is φ = 331189920.

The previous prime is 331301189. The next prime is 331301221. The reversal of 331301213 is 312103133.

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 285846649 + 45454564 = 16907^2 + 6742^2 .

It is a cyclic number.

It is not a de Polignac number, because 331301213 - 2¹⁴ = 331284829 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 = 331301191 and 331301200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331301263) 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, 51056 + ... + 57177.

It is an arithmetic number, because the mean of its divisors is an integer number (82853127).

Almost surely, 2^331301213 is an apocalyptic number.

It is an amenable number.

331301213 is a deficient number, since it is larger than the sum of its proper divisors (111295).

331301213 is a wasteful number, since it uses less digits than its factorization.

331301213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111294.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331301213 is about 18201.6815981381. The cubic root of 331301213 is about 691.9494078252.

Adding to 331301213 its reverse (312103133), we get a palindrome (643404346).

It can be divided in two parts, 33130 and 1213, that added together give a palindrome (34343).

The spelling of 331301213 in words is "three hundred thirty-one million, three hundred one thousand, two hundred thirteen".