311442212 has 24 divisors (see below), whose sum is σ = 553337400. Its totient is φ = 153363456.

The previous prime is 311442211. The next prime is 311442217. The reversal of 311442212 is 212244113.

It can be written as a sum of positive squares in 4 ways, for example, as 148011556 + 163430656 = 12166^2 + 12784^2 .

It is not an unprimeable number, because it can be changed into a prime (311442211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73364 + ... + 77492.

It is an arithmetic number, because the mean of its divisors is an integer number (23055725).

Almost surely, 2^311442212 is an apocalyptic number.

It is an amenable number.

311442212 is a deficient number, since it is larger than the sum of its proper divisors (241895188).

311442212 is a wasteful number, since it uses less digits than its factorization.

311442212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415 (or 4413 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 311442212 is about 17647.7254058420. The cubic root of 311442212 is about 677.8378643695.

Adding to 311442212 its reverse (212244113), we get a palindrome (523686325).

The spelling of 311442212 in words is "three hundred eleven million, four hundred forty-two thousand, two hundred twelve".