331122240 has 84 divisors (see below), whose sum is σ = 1138932444. Its totient is φ = 88298496.

The previous prime is 331122229. The next prime is 331122247. The reversal of 331122240 is 42221133.

It can be written as a sum of positive squares in 2 ways, for example, as 242611776 + 88510464 = 15576^2 + 9408^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (331122247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54607 + ... + 60366.

Almost surely, 2^331122240 is an apocalyptic number.

331122240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331122240 is an abundant number, since it is smaller than the sum of its proper divisors (807810204).

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

331122240 is a wasteful number, since it uses less digits than its factorization.

331122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114996 (or 114983 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 331122240 is about 18196.7645475782. The cubic root of 331122240 is about 691.8247855146.

Adding to 331122240 its reverse (42221133), we get a palindrome (373343373).

The spelling of 331122240 in words is "three hundred thirty-one million, one hundred twenty-two thousand, two hundred forty".