331904390042 has 16 divisors (see below), whose sum is σ = 520624592640. Its totient is φ = 158394027792.

The previous prime is 331904390029. The next prime is 331904390117. The reversal of 331904390042 is 240093409133.

It is a happy number.

It is a super-2 number, since 2×331904390042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331904389978 and 331904390005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7770617 + ... + 7813212.

It is an arithmetic number, because the mean of its divisors is an integer number (32539037040).

Almost surely, 2^331904390042 is an apocalyptic number.

331904390042 is a deficient number, since it is larger than the sum of its proper divisors (188720202598).

331904390042 is a wasteful number, since it uses less digits than its factorization.

331904390042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15584317.

The product of its (nonzero) digits is 69984, while the sum is 38.

Adding to 331904390042 its reverse (240093409133), we get a palindrome (571997799175).

The spelling of 331904390042 in words is "three hundred thirty-one billion, nine hundred four million, three hundred ninety thousand, forty-two".