331342420 has 24 divisors (see below), whose sum is σ = 697624200. Its totient is φ = 132193152.

The previous prime is 331342411. The next prime is 331342447. The reversal of 331342420 is 24243133.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 248004 + 331094416 = 498^2 + 18196^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331342391 and 331342400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13515 + ... + 29074.

It is an arithmetic number, because the mean of its divisors is an integer number (29067675).

Almost surely, 2^331342420 is an apocalyptic number.

It is an amenable number.

331342420 is an abundant number, since it is smaller than the sum of its proper divisors (366281780).

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

331342420 is a wasteful number, since it uses less digits than its factorization.

331342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42987 (or 42985 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 331342420 is about 18202.8135187943. The cubic root of 331342420 is about 691.9780946879.

Adding to 331342420 its reverse (24243133), we get a palindrome (355585553).

The spelling of 331342420 in words is "three hundred thirty-one million, three hundred forty-two thousand, four hundred twenty".