331989131 has 4 divisors (see below), whose sum is σ = 332289600. Its totient is φ = 331688664.

The previous prime is 331989083. The next prime is 331989139. The reversal of 331989131 is 131989133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331989131 is a prime.

It is a super-2 number, since 2×331989131² = 220433566204270322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331989139) 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, 148571 + ... + 150788.

It is an arithmetic number, because the mean of its divisors is an integer number (83072400).

Almost surely, 2^331989131 is an apocalyptic number.

331989131 is a deficient number, since it is larger than the sum of its proper divisors (300469).

331989131 is a wasteful number, since it uses less digits than its factorization.

331989131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300468.

The product of its digits is 17496, while the sum is 38.

The square root of 331989131 is about 18220.5688989120. The cubic root of 331989131 is about 692.4280008729.

The spelling of 331989131 in words is "three hundred thirty-one million, nine hundred eighty-nine thousand, one hundred thirty-one".