331211242 has 4 divisors (see below), whose sum is σ = 496816866. Its totient is φ = 165605620.

The previous prime is 331211203. The next prime is 331211263. The reversal of 331211242 is 242112133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 310499641 + 20711601 = 17621^2 + 4551^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82802809 + ... + 82802812.

Almost surely, 2^331211242 is an apocalyptic number.

331211242 is a deficient number, since it is larger than the sum of its proper divisors (165605624).

331211242 is a wasteful number, since it uses less digits than its factorization.

331211242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165605623.

The product of its digits is 288, while the sum is 19.

The square root of 331211242 is about 18199.2099279062. The cubic root of 331211242 is about 691.8867649149.

Adding to 331211242 its reverse (242112133), we get a palindrome (573323375).

The spelling of 331211242 in words is "three hundred thirty-one million, two hundred eleven thousand, two hundred forty-two".