311000212 has 6 divisors (see below), whose sum is σ = 544250378. Its totient is φ = 155500104.

The previous prime is 311000203. The next prime is 311000219. The reversal of 311000212 is 212000113.

It can be written as a sum of positive squares in only one way, i.e., 232074756 + 78925456 = 15234^2 + 8884^2 .

It is a super-2 number, since 2×311000212² = 193442263728089888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311000219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38875023 + ... + 38875030.

Almost surely, 2^311000212 is an apocalyptic number.

It is an amenable number.

311000212 is a deficient number, since it is larger than the sum of its proper divisors (233250166).

311000212 is a wasteful number, since it uses less digits than its factorization.

311000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77750057 (or 77750055 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 311000212 is about 17635.1980992559. The cubic root of 311000212 is about 677.5170491754.

Adding to 311000212 its reverse (212000113), we get a palindrome (523000325).

Subtracting from 311000212 its reverse (212000113), we obtain a palindrome (99000099).

The spelling of 311000212 in words is "three hundred eleven million, two hundred twelve", and thus it is an aban number.