331021142 has 8 divisors (see below), whose sum is σ = 496647696. Its totient is φ = 165471912.

The previous prime is 331021123. The next prime is 331021147. The reversal of 331021142 is 241120133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 331021142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331021147) 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 3 ways as a sum of consecutive naturals, for example, 7073 + ... + 26684.

It is an arithmetic number, because the mean of its divisors is an integer number (62080962).

Almost surely, 2^331021142 is an apocalyptic number.

331021142 is a deficient number, since it is larger than the sum of its proper divisors (165626554).

331021142 is a wasteful number, since it uses less digits than its factorization.

331021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38662.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 331021142 is about 18193.9864240908. The cubic root of 331021142 is about 691.7543692018.

Adding to 331021142 its reverse (241120133), we get a palindrome (572141275).

The spelling of 331021142 in words is "three hundred thirty-one million, twenty-one thousand, one hundred forty-two".