331132242 has 64 divisors (see below), whose sum is σ = 792760320. Its totient is φ = 90154944.

The previous prime is 331132229. The next prime is 331132253. The reversal of 331132242 is 242231133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359859 + ... + 360777.

It is an arithmetic number, because the mean of its divisors is an integer number (12386880).

Almost surely, 2^331132242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331132242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396380160).

331132242 is an abundant number, since it is smaller than the sum of its proper divisors (461628078).

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

331132242 is a wasteful number, since it uses less digits than its factorization.

331132242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

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

The square root of 331132242 is about 18197.0393745796. The cubic root of 331132242 is about 691.8317512823.

Adding to 331132242 its reverse (242231133), we get a palindrome (573363375).

It can be divided in two parts, 3311 and 32242, that added together give a palindrome (35553).

The spelling of 331132242 in words is "three hundred thirty-one million, one hundred thirty-two thousand, two hundred forty-two".