331243430 has 24 divisors (see below), whose sum is σ = 693584208. Its totient is φ = 113569008.

The previous prime is 331243427. The next prime is 331243439. The reversal of 331243430 is 34342133.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331243396 and 331243405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331243439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337514 + ... + 338493.

It is an arithmetic number, because the mean of its divisors is an integer number (28899342).

Almost surely, 2^331243430 is an apocalyptic number.

331243430 is an abundant number, since it is smaller than the sum of its proper divisors (362340778).

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

331243430 is a wasteful number, since it uses less digits than its factorization.

331243430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676028 (or 676021 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 331243430 is about 18200.0942305253. The cubic root of 331243430 is about 691.9091773282.

Adding to 331243430 its reverse (34342133), we get a palindrome (365585563).

The spelling of 331243430 in words is "three hundred thirty-one million, two hundred forty-three thousand, four hundred thirty".