331322138 has 16 divisors (see below), whose sum is σ = 581190720. Its totient is φ = 138692736.

The previous prime is 331322137. The next prime is 331322219. The reversal of 331322138 is 831223133.

It is not an unprimeable number, because it can be changed into a prime (331322137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274583 + ... + 275786.

It is an arithmetic number, because the mean of its divisors is an integer number (36324420).

Almost surely, 2^331322138 is an apocalyptic number.

331322138 is a deficient number, since it is larger than the sum of its proper divisors (249868582).

331322138 is a wasteful number, since it uses less digits than its factorization.

331322138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550421.

The product of its digits is 2592, while the sum is 26.

The square root of 331322138 is about 18202.2563985897. The cubic root of 331322138 is about 691.9639753708.

The spelling of 331322138 in words is "three hundred thirty-one million, three hundred twenty-two thousand, one hundred thirty-eight".