311322013040 has 40 divisors (see below), whose sum is σ = 724108118400. Its totient is φ = 124479869696.

The previous prime is 311322013027. The next prime is 311322013063. The reversal of 311322013040 is 40310223113.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559424 + ... + 967263.

It is an arithmetic number, because the mean of its divisors is an integer number (18102702960).

Almost surely, 2^311322013040 is an apocalyptic number.

It is an amenable number.

311322013040 is an abundant number, since it is smaller than the sum of its proper divisors (412786105360).

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

311322013040 is a wasteful number, since it uses less digits than its factorization.

311322013040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529249 (or 1529243 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311322013040 its reverse (40310223113), we get a palindrome (351632236153).

The spelling of 311322013040 in words is "three hundred eleven billion, three hundred twenty-two million, thirteen thousand, forty".