331403421 has 4 divisors (see below), whose sum is σ = 441871232. Its totient is φ = 220935612.

The previous prime is 331403419. The next prime is 331403437. The reversal of 331403421 is 124304133.

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 331403421 - 2¹ = 331403419 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 (331403521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55233901 + ... + 55233906.

It is an arithmetic number, because the mean of its divisors is an integer number (110467808).

Almost surely, 2^331403421 is an apocalyptic number.

It is an amenable number.

331403421 is a deficient number, since it is larger than the sum of its proper divisors (110467811).

331403421 is a wasteful number, since it uses less digits than its factorization.

331403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110467810.

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

The square root of 331403421 is about 18204.4890343014. The cubic root of 331403421 is about 692.0205570703.

Adding to 331403421 its reverse (124304133), we get a palindrome (455707554).

The spelling of 331403421 in words is "three hundred thirty-one million, four hundred three thousand, four hundred twenty-one".