331330320 has 60 divisors (see below), whose sum is σ = 1112720076. Its totient is φ = 88354560.

The previous prime is 331330319. The next prime is 331330331. The reversal of 331330320 is 23033133.

331330320 is a `hidden beast` number, since 3 + 313 + 30 + 320 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 205979904 + 125350416 = 14352^2 + 11196^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 331330293 and 331330302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229371 + ... + 230810.

Almost surely, 2^331330320 is an apocalyptic number.

331330320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331330320 is an abundant number, since it is smaller than the sum of its proper divisors (781389756).

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

331330320 is a wasteful number, since it uses less digits than its factorization.

331330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460200 (or 460191 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

The square root of 331330320 is about 18202.4811495576. The cubic root of 331330320 is about 691.9696713406.

Adding to 331330320 its reverse (23033133), we get a palindrome (354363453).

It can be divided in two parts, 3313 and 30320, that added together give a palindrome (33633).

The spelling of 331330320 in words is "three hundred thirty-one million, three hundred thirty thousand, three hundred twenty".