311030023140 has 36 divisors (see below), whose sum is σ = 943457737404. Its totient is φ = 82941339456.

The previous prime is 311030023111. The next prime is 311030023151. The reversal of 311030023140 is 41320030113.

It can be written as a sum of positive squares in 2 ways, for example, as 197471806884 + 113558216256 = 444378^2 + 336984^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863972107 + ... + 863972466.

Almost surely, 2^311030023140 is an apocalyptic number.

311030023140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311030023140 is an abundant number, since it is smaller than the sum of its proper divisors (632427714264).

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

311030023140 is a wasteful number, since it uses less digits than its factorization.

311030023140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727944588 (or 1727944583 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 311030023140 its reverse (41320030113), we get a palindrome (352350053253).

The spelling of 311030023140 in words is "three hundred eleven billion, thirty million, twenty-three thousand, one hundred forty".