331012240 has 40 divisors (see below), whose sum is σ = 828806328. Its totient is φ = 122219520.

The previous prime is 331012223. The next prime is 331012259. The reversal of 331012240 is 42210133.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17438976 + 313573264 = 4176^2 + 17708^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158101 + ... + 160180.

Almost surely, 2^331012240 is an apocalyptic number.

It is an amenable number.

331012240 is an abundant number, since it is smaller than the sum of its proper divisors (497794088).

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

331012240 is a wasteful number, since it uses less digits than its factorization.

331012240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318307 (or 318301 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 331012240 is about 18193.7417811730. The cubic root of 331012240 is about 691.7481681351.

Adding to 331012240 its reverse (42210133), we get a palindrome (373222373).

The spelling of 331012240 in words is "three hundred thirty-one million, twelve thousand, two hundred forty".