331001138 has 16 divisors (see below), whose sum is σ = 536941440. Its totient is φ = 152127696.

The previous prime is 331001137. The next prime is 331001141. The reversal of 331001138 is 831100133.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (331001131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20420 + ... + 32847.

It is an arithmetic number, because the mean of its divisors is an integer number (33558840).

Almost surely, 2^331001138 is an apocalyptic number.

331001138 is a deficient number, since it is larger than the sum of its proper divisors (205940302).

331001138 is a wasteful number, since it uses less digits than its factorization.

331001138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53521.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 331001138 is about 18193.4366737019. The cubic root of 331001138 is about 691.7404344090.

The spelling of 331001138 in words is "three hundred thirty-one million, one thousand, one hundred thirty-eight".