331315138 has 64 divisors (see below), whose sum is σ = 654428160. Its totient is φ = 121968000.

The previous prime is 331315133. The next prime is 331315157. The reversal of 331315138 is 831513133.

It is not an unprimeable number, because it can be changed into a prime (331315133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314713 + ... + 315763.

It is an arithmetic number, because the mean of its divisors is an integer number (10225440).

Almost surely, 2^331315138 is an apocalyptic number.

331315138 is a deficient number, since it is larger than the sum of its proper divisors (323113022).

331315138 is a wasteful number, since it uses less digits than its factorization.

331315138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its digits is 3240, while the sum is 28.

The square root of 331315138 is about 18202.0641137207. The cubic root of 331315138 is about 691.9591021861.

The spelling of 331315138 in words is "three hundred thirty-one million, three hundred fifteen thousand, one hundred thirty-eight".