331660242 has 48 divisors (see below), whose sum is σ = 764351640. Its totient is φ = 103574016.

The previous prime is 331660187. The next prime is 331660279. The reversal of 331660242 is 242066133.

331660242 is a `hidden beast` number, since 3 + 3 + 16 + 602 + 42 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 323244441 + 8415801 = 17979^2 + 2901^2 .

It is a super-2 number, since 2×331660242² = 219997032246997128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67708 + ... + 72440.

Almost surely, 2^331660242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331660242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382175820).

331660242 is an abundant number, since it is smaller than the sum of its proper divisors (432691398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331660242 is a wasteful number, since it uses less digits than its factorization.

331660242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987 (or 4984 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 331660242 is about 18211.5414504100. The cubic root of 331660242 is about 692.1992713005.

The spelling of 331660242 in words is "three hundred thirty-one million, six hundred sixty thousand, two hundred forty-two".