2311131204 has 84 divisors (see below), whose sum is σ = 6092185260. Its totient is φ = 766791360.

The previous prime is 2311131169. The next prime is 2311131211. The reversal of 2311131204 is 4021311132.

It can be written as a sum of positive squares in 2 ways, for example, as 1380271104 + 930860100 = 37152^2 + 30510^2 .

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 27 ways as a sum of consecutive naturals, for example, 666034 + ... + 669494.

It is an arithmetic number, because the mean of its divisors is an integer number (72526015).

Almost surely, 2^2311131204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311131204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3046092630).

2311131204 is an abundant number, since it is smaller than the sum of its proper divisors (3781054056).

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

2311131204 is a wasteful number, since it uses less digits than its factorization.

2311131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2311131204 is about 48074.2259844087. The cubic root of 2311131204 is about 1322.1321533209.

Adding to 2311131204 its reverse (4021311132), we get a palindrome (6332442336).

The spelling of 2311131204 in words is "two billion, three hundred eleven million, one hundred thirty-one thousand, two hundred four".