331000042 has 8 divisors (see below), whose sum is σ = 498293316. Its totient is φ = 164902272.

The previous prime is 331000037. The next prime is 331000063. The reversal of 331000042 is 240000133.

It can be written as a sum of positive squares in 2 ways, for example, as 259242201 + 71757841 = 16101^2 + 8471^2 .

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

It is a super-2 number, since 2×331000042² = 219122055608003528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 330999986 and 331000031.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298183 + ... + 299290.

Almost surely, 2^331000042 is an apocalyptic number.

331000042 is a deficient number, since it is larger than the sum of its proper divisors (167293274).

331000042 is a wasteful number, since it uses less digits than its factorization.

331000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597752.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 331000042 is about 18193.4065529246. The cubic root of 331000042 is about 691.7396709188.

Adding to 331000042 its reverse (240000133), we get a palindrome (571000175).

Subtracting from 331000042 its reverse (240000133), we obtain a palindrome (90999909).

The spelling of 331000042 in words is "three hundred thirty-one million, forty-two", and thus it is an aban number.