311011242 has 16 divisors (see below), whose sum is σ = 623819232. Its totient is φ = 103370960.

The previous prime is 311011237. The next prime is 311011273. The reversal of 311011242 is 242110113.

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, 72609 + ... + 76772.

It is an arithmetic number, because the mean of its divisors is an integer number (38988702).

Almost surely, 2^311011242 is an apocalyptic number.

311011242 is an abundant number, since it is smaller than the sum of its proper divisors (312807990).

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

311011242 is a wasteful number, since it uses less digits than its factorization.

311011242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149733.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 311011242 is about 17635.5108233360. The cubic root of 311011242 is about 677.5250587355.

Adding to 311011242 its reverse (242110113), we get a palindrome (553121355).

The spelling of 311011242 in words is "three hundred eleven million, eleven thousand, two hundred forty-two".