311530242 has 8 divisors (see below), whose sum is σ = 623060496. Its totient is φ = 103843412.

The previous prime is 311530231. The next prime is 311530273. The reversal of 311530242 is 242035113.

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

311530242 is an admirable number.

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, 25960848 + ... + 25960859.

It is an arithmetic number, because the mean of its divisors is an integer number (77882562).

Almost surely, 2^311530242 is an apocalyptic number.

311530242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

311530242 is a wasteful number, since it uses less digits than its factorization.

311530242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51921712.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 311530242 is about 17650.2193187507. The cubic root of 311530242 is about 677.9017226005.

Adding to 311530242 its reverse (242035113), we get a palindrome (553565355).

The spelling of 311530242 in words is "three hundred eleven million, five hundred thirty thousand, two hundred forty-two".