331421013 has 24 divisors (see below), whose sum is σ = 596846016. Its totient is φ = 172166400.

The previous prime is 331421011. The next prime is 331421021. The reversal of 331421013 is 310124133.

It is not a de Polignac number, because 331421013 - 2¹ = 331421011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331421011) 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 23 ways as a sum of consecutive naturals, for example, 238428 + ... + 239813.

It is an arithmetic number, because the mean of its divisors is an integer number (24868584).

Almost surely, 2^331421013 is an apocalyptic number.

331421013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

331421013 is a deficient number, since it is larger than the sum of its proper divisors (265425003).

331421013 is a wasteful number, since it uses less digits than its factorization.

331421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478265 (or 478262 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331421013 is about 18204.9722054168. The cubic root of 331421013 is about 692.0328017741.

Adding to 331421013 its reverse (310124133), we get a palindrome (641545146).

The spelling of 331421013 in words is "three hundred thirty-one million, four hundred twenty-one thousand, thirteen".