331213240 has 16 divisors (see below), whose sum is σ = 745229880. Its totient is φ = 132485280.

The previous prime is 331213237. The next prime is 331213249. The reversal of 331213240 is 42312133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331213249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4140126 + ... + 4140205.

Almost surely, 2^331213240 is an apocalyptic number.

It is an amenable number.

331213240 is an abundant number, since it is smaller than the sum of its proper divisors (414016640).

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

331213240 is a wasteful number, since it uses less digits than its factorization.

331213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280342 (or 8280338 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 331213240 is about 18199.2648203162. The cubic root of 331213240 is about 691.8881561589. Note that the first 3 decimals are identical.

Adding to 331213240 its reverse (42312133), we get a palindrome (373525373).

The spelling of 331213240 in words is "three hundred thirty-one million, two hundred thirteen thousand, two hundred forty".