331531340 has 48 divisors (see below), whose sum is σ = 808739904. Its totient is φ = 111801600.

The previous prime is 331531339. The next prime is 331531349. The reversal of 331531340 is 43135133.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (331531349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10871 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (16848748).

Almost surely, 2^331531340 is an apocalyptic number.

It is an amenable number.

331531340 is an abundant number, since it is smaller than the sum of its proper divisors (477208564).

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

331531340 is a wasteful number, since it uses less digits than its factorization.

331531340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38898 (or 38896 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 331531340 is about 18208.0020869946. The cubic root of 331531340 is about 692.1095837015.

Adding to 331531340 its reverse (43135133), we get a palindrome (374666473).

The spelling of 331531340 in words is "three hundred thirty-one million, five hundred thirty-one thousand, three hundred forty".