311220034040 has 32 divisors (see below), whose sum is σ = 700264809360. Its totient is φ = 124484505600.

The previous prime is 311220034039. The next prime is 311220034049. The reversal of 311220034040 is 40430022113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220034049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1693880 + ... + 1868600.

Almost surely, 2^311220034040 is an apocalyptic number.

It is an amenable number.

311220034040 is an abundant number, since it is smaller than the sum of its proper divisors (389044775320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311220034040 is a wasteful number, since it uses less digits than its factorization.

311220034040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219263 (or 219259 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 311220034040 its reverse (40430022113), we get a palindrome (351650056153).

The spelling of 311220034040 in words is "three hundred eleven billion, two hundred twenty million, thirty-four thousand, forty".