331213241 has 4 divisors (see below), whose sum is σ = 332783184. Its totient is φ = 329643300.

The previous prime is 331213237. The next prime is 331213249. The reversal of 331213241 is 142312133.

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: 142312133 = 223 ⋅638171.

It is a cyclic number.

It is not a de Polignac number, because 331213241 - 2² = 331213237 is a prime.

It is a super-2 number, since 2×331213241² = 219404422027448162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331213249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784655 + ... + 785076.

It is an arithmetic number, because the mean of its divisors is an integer number (83195796).

Almost surely, 2^331213241 is an apocalyptic number.

It is an amenable number.

331213241 is a deficient number, since it is larger than the sum of its proper divisors (1569943).

331213241 is a wasteful number, since it uses less digits than its factorization.

331213241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569942.

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

The square root of 331213241 is about 18199.2648477899. The cubic root of 331213241 is about 691.8881568552. Note that the first 3 decimals are identical.

Adding to 331213241 its reverse (142312133), we get a palindrome (473525374).

The spelling of 331213241 in words is "three hundred thirty-one million, two hundred thirteen thousand, two hundred forty-one".