331233421 has 4 divisors (see below), whose sum is σ = 331272000. Its totient is φ = 331194844.

The previous prime is 331233391. The next prime is 331233431. The reversal of 331233421 is 124332133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 331233421 - 2¹⁹ = 330709133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331233392 and 331233401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331233431) 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, 60 + ... + 25738.

It is an arithmetic number, because the mean of its divisors is an integer number (82818000).

Almost surely, 2^331233421 is an apocalyptic number.

It is an amenable number.

331233421 is a deficient number, since it is larger than the sum of its proper divisors (38579).

331233421 is a wasteful number, since it uses less digits than its factorization.

331233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38578.

The product of its digits is 1296, while the sum is 22.

The square root of 331233421 is about 18199.8192573443. The cubic root of 331233421 is about 691.9022082454.

Adding to 331233421 its reverse (124332133), we get a palindrome (455565554).

The spelling of 331233421 in words is "three hundred thirty-one million, two hundred thirty-three thousand, four hundred twenty-one".