311213116 has 6 divisors (see below), whose sum is σ = 544622960. Its totient is φ = 155606556.

The previous prime is 311213113. The next prime is 311213117. The reversal of 311213116 is 611312113.

It is a junction number, because it is equal to n+sod(n) for n = 311213093 and 311213102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311213113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38901636 + ... + 38901643.

Almost surely, 2^311213116 is an apocalyptic number.

It is an amenable number.

311213116 is a deficient number, since it is larger than the sum of its proper divisors (233409844).

311213116 is a wasteful number, since it uses less digits than its factorization.

311213116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77803283 (or 77803281 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 311213116 is about 17641.2334035917. The cubic root of 311213116 is about 677.6716184017.

Adding to 311213116 its reverse (611312113), we get a palindrome (922525229).

The spelling of 311213116 in words is "three hundred eleven million, two hundred thirteen thousand, one hundred sixteen".