331213442 has 12 divisors (see below), whose sum is σ = 577933830. Its totient is φ = 141948576.

The previous prime is 331213439. The next prime is 331213447. The reversal of 331213442 is 244312133.

331213442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 324396121 + 6817321 = 18011^2 + 2611^2 .

It is a super-2 number, since 2×331213442² = 219404688322974728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331213447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1689767 + ... + 1689962.

Almost surely, 2^331213442 is an apocalyptic number.

331213442 is a deficient number, since it is larger than the sum of its proper divisors (246720388).

331213442 is a wasteful number, since it uses less digits than its factorization.

331213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379745 (or 3379738 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 331213442 is about 18199.2703699901. The cubic root of 331213442 is about 691.8882968149. Note that the first 3 decimals are identical.

Adding to 331213442 its reverse (244312133), we get a palindrome (575525575).

It can be divided in two parts, 33121 and 3442, that added together give a palindrome (36563).

The spelling of 331213442 in words is "three hundred thirty-one million, two hundred thirteen thousand, four hundred forty-two".