331241213 has 4 divisors (see below), whose sum is σ = 331371648. Its totient is φ = 331110780.

The previous prime is 331241191. The next prime is 331241221. The reversal of 331241213 is 312142133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312142133 = 809 ⋅385837.

It is a cyclic number.

It is not a de Polignac number, because 331241213 - 2¹² = 331237117 is a prime.

It is a super-2 number, since 2×331241213² = 219441482379422738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331241263) 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, 61331 + ... + 66512.

It is an arithmetic number, because the mean of its divisors is an integer number (82842912).

Almost surely, 2^331241213 is an apocalyptic number.

It is an amenable number.

331241213 is a deficient number, since it is larger than the sum of its proper divisors (130435).

331241213 is a wasteful number, since it uses less digits than its factorization.

331241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130434.

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

The square root of 331241213 is about 18200.0333241453. The cubic root of 331241213 is about 691.9076336840.

Adding to 331241213 its reverse (312142133), we get a palindrome (643383346).

The spelling of 331241213 in words is "three hundred thirty-one million, two hundred forty-one thousand, two hundred thirteen".