331213242 has 8 divisors (see below), whose sum is σ = 662426496. Its totient is φ = 110404412.

The previous prime is 331213237. The next prime is 331213249. The reversal of 331213242 is 242312133.

It is a sphenic number, since it is the product of 3 distinct primes.

331213242 is an admirable 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, 27601098 + ... + 27601109.

It is an arithmetic number, because the mean of its divisors is an integer number (82803312).

Almost surely, 2^331213242 is an apocalyptic number.

331213242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331213242 is a wasteful number, since it uses less digits than its factorization.

331213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55202212.

The product of its digits is 864, while the sum is 21.

The square root of 331213242 is about 18199.2648752635. The cubic root of 331213242 is about 691.8881575515. Note that the first 3 decimals are identical.

Adding to 331213242 its reverse (242312133), we get a palindrome (573525375).

It can be divided in two parts, 33121 and 3242, that added together give a palindrome (36363).

The spelling of 331213242 in words is "three hundred thirty-one million, two hundred thirteen thousand, two hundred forty-two".