331434021 has 4 divisors (see below), whose sum is σ = 441912032. Its totient is φ = 220956012.

The previous prime is 331434017. The next prime is 331434031. The reversal of 331434021 is 120434133.

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.

It is not a de Polignac number, because 331434021 - 2² = 331434017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331434001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55239001 + ... + 55239006.

It is an arithmetic number, because the mean of its divisors is an integer number (110478008).

Almost surely, 2^331434021 is an apocalyptic number.

It is an amenable number.

331434021 is a deficient number, since it is larger than the sum of its proper divisors (110478011).

331434021 is a wasteful number, since it uses less digits than its factorization.

331434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110478010.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 331434021 is about 18205.3294669446. The cubic root of 331434021 is about 692.0418555602.

Adding to 331434021 its reverse (120434133), we get a palindrome (451868154).

The spelling of 331434021 in words is "three hundred thirty-one million, four hundred thirty-four thousand, twenty-one".