2231856656 has 40 divisors (see below), whose sum is σ = 4482475008. Its totient is φ = 1075392000.

The previous prime is 2231856643. The next prime is 2231856673. The reversal of 2231856656 is 6566581322.

It is a super-3 number, since 3×2231856656³ (a number of 29 digits) contains 333 as substring.

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, 110201 + ... + 128871.

Almost surely, 2^2231856656 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 2231856656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241237504).

2231856656 is an abundant number, since it is smaller than the sum of its proper divisors (2250618352).

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

2231856656 is a wasteful number, since it uses less digits than its factorization.

2231856656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18951 (or 18945 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 2231856656 is about 47242.5301608625. The cubic root of 2231856656 is about 1306.8390381840.

The spelling of 2231856656 in words is "two billion, two hundred thirty-one million, eight hundred fifty-six thousand, six hundred fifty-six".