2331505656 has 96 divisors (see below), whose sum is σ = 6663056400. Its totient is φ = 734469120.

The previous prime is 2331505621. The next prime is 2331505697. The reversal of 2331505656 is 6565051332.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2331505656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 628800 + ... + 632496.

Almost surely, 2^2331505656 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 2331505656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3331528200).

2331505656 is an abundant number, since it is smaller than the sum of its proper divisors (4331550744).

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

2331505656 is a wasteful number, since it uses less digits than its factorization.

2331505656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 2331505656 is about 48285.6671901715. The cubic root of 2331505656 is about 1326.0060058558.

Adding to 2331505656 its reverse (6565051332), we get a palindrome (8896556988).

The spelling of 2331505656 in words is "two billion, three hundred thirty-one million, five hundred five thousand, six hundred fifty-six".