331230420 has 72 divisors (see below), whose sum is σ = 1057623840. Its totient is φ = 83678400.

The previous prime is 331230391. The next prime is 331230421. The reversal of 331230420 is 24032133.

It is a super-2 number, since 2×331230420² = 219427182266752800, which contains 22 as substring.

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 = 331230393 and 331230402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331230421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45006 + ... + 51845.

It is an arithmetic number, because the mean of its divisors is an integer number (14689220).

Almost surely, 2^331230420 is an apocalyptic number.

331230420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331230420 is an abundant number, since it is smaller than the sum of its proper divisors (726393420).

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

331230420 is a wasteful number, since it uses less digits than its factorization.

331230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96885 (or 96880 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 331230420 is about 18199.7368112838. The cubic root of 331230420 is about 691.9001186769.

Adding to 331230420 its reverse (24032133), we get a palindrome (355262553).

The spelling of 331230420 in words is "three hundred thirty-one million, two hundred thirty thousand, four hundred twenty".