311013242 has 16 divisors (see below), whose sum is σ = 491637600. Its totient is φ = 147152880.

The previous prime is 311013233. The next prime is 311013247. The reversal of 311013242 is 242310113.

It is a self number, because there is not a number n which added to its sum of digits gives 311013242.

It is not an unprimeable number, because it can be changed into a prime (311013247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32684 + ... + 41112.

It is an arithmetic number, because the mean of its divisors is an integer number (30727350).

Almost surely, 2^311013242 is an apocalyptic number.

311013242 is a deficient number, since it is larger than the sum of its proper divisors (180624358).

311013242 is a wasteful number, since it uses less digits than its factorization.

311013242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9421.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311013242 is about 17635.5675270177. The cubic root of 311013242 is about 677.5265110380.

Adding to 311013242 its reverse (242310113), we get a palindrome (553323355).

It can be divided in two parts, 31101 and 3242, that added together give a palindrome (34343).

The spelling of 311013242 in words is "three hundred eleven million, thirteen thousand, two hundred forty-two".