331420330 has 16 divisors (see below), whose sum is σ = 598444200. Its totient is φ = 132148672.

The previous prime is 331420303. The next prime is 331420333. The reversal of 331420330 is 33024133.

It can be written as a sum of positive squares in 4 ways, for example, as 160098409 + 171321921 = 12653^2 + 13089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331420298 and 331420307.

It is not an unprimeable number, because it can be changed into a prime (331420333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49105 + ... + 55444.

Almost surely, 2^331420330 is an apocalyptic number.

331420330 is a deficient number, since it is larger than the sum of its proper divisors (267023870).

331420330 is a wasteful number, since it uses less digits than its factorization.

331420330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104873.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 331420330 is about 18204.9534467957. The cubic root of 331420330 is about 692.0323263881.

Adding to 331420330 its reverse (33024133), we get a palindrome (364444463).

The spelling of 331420330 in words is "three hundred thirty-one million, four hundred twenty thousand, three hundred thirty".