331431923 has 8 divisors (see below), whose sum is σ = 343711200. Its totient is φ = 319209408.

The previous prime is 331431889. The next prime is 331431937. The reversal of 331431923 is 329134133.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331431923 - 2¹² = 331427827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331431973) 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, 2111 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (42963900).

Almost surely, 2^331431923 is an apocalyptic number.

331431923 is a deficient number, since it is larger than the sum of its proper divisors (12279277).

331431923 is a wasteful number, since it uses less digits than its factorization.

331431923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28381.

The product of its digits is 5832, while the sum is 29.

The square root of 331431923 is about 18205.2718463636. The cubic root of 331431923 is about 692.0403953331.

The spelling of 331431923 in words is "three hundred thirty-one million, four hundred thirty-one thousand, nine hundred twenty-three".