331430423 has 4 divisors (see below), whose sum is σ = 340388040. Its totient is φ = 322472808.

The previous prime is 331430387. The next prime is 331430431. The reversal of 331430423 is 324034133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331430423 is a prime.

It is a super-2 number, since 2×331430423² = 219692250579917858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331430443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4478753 + ... + 4478826.

It is an arithmetic number, because the mean of its divisors is an integer number (85097010).

Almost surely, 2^331430423 is an apocalyptic number.

331430423 is a deficient number, since it is larger than the sum of its proper divisors (8957617).

331430423 is an equidigital number, since it uses as much as digits as its factorization.

331430423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957616.

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

The square root of 331430423 is about 18205.2306494590. The cubic root of 331430423 is about 692.0393513156.

Adding to 331430423 its reverse (324034133), we get a palindrome (655464556).

The spelling of 331430423 in words is "three hundred thirty-one million, four hundred thirty thousand, four hundred twenty-three".