311213042 has 16 divisors (see below), whose sum is σ = 546521472. Its totient is φ = 130123680.

The previous prime is 311212997. The next prime is 311213047. The reversal of 311213042 is 240312113.

It is a self number, because there is not a number n which added to its sum of digits gives 311213042.

It is not an unprimeable number, because it can be changed into a prime (311213047) 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, 270518 + ... + 271665.

It is an arithmetic number, because the mean of its divisors is an integer number (34157592).

Almost surely, 2^311213042 is an apocalyptic number.

311213042 is a deficient number, since it is larger than the sum of its proper divisors (235308430).

311213042 is a wasteful number, since it uses less digits than its factorization.

311213042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542233.

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

The square root of 311213042 is about 17641.2313062326. The cubic root of 311213042 is about 677.6715646896.

Adding to 311213042 its reverse (240312113), we get a palindrome (551525155).

The spelling of 311213042 in words is "three hundred eleven million, two hundred thirteen thousand, forty-two".