311440520005 has 16 divisors (see below), whose sum is σ = 377615260800. Its totient is φ = 246563761600.

The previous prime is 311440519961. The next prime is 311440520009. The reversal of 311440520005 is 500025044113.

It is a happy number.

It is not a de Polignac number, because 311440520005 - 2¹¹ = 311440517957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311440520009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878466 + ... + 1180924.

It is an arithmetic number, because the mean of its divisors is an integer number (23600953800).

Almost surely, 2^311440520005 is an apocalyptic number.

It is an amenable number.

311440520005 is a deficient number, since it is larger than the sum of its proper divisors (66174740795).

311440520005 is a wasteful number, since it uses less digits than its factorization.

311440520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304604.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 311440520005 its reverse (500025044113), we get a palindrome (811465564118).

The spelling of 311440520005 in words is "three hundred eleven billion, four hundred forty million, five hundred twenty thousand, five".