2231631616 has 72 divisors (see below), whose sum is σ = 4844402640. Its totient is φ = 1021722624.

The previous prime is 2231631569. The next prime is 2231631617. The reversal of 2231631616 is 6161361322.

It is a super-3 number, since 3×2231631616³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231631617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154095 + ... + 167953.

It is an arithmetic number, because the mean of its divisors is an integer number (67283370).

Almost surely, 2^2231631616 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 2231631616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2422201320).

2231631616 is an abundant number, since it is smaller than the sum of its proper divisors (2612771024).

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

2231631616 is a wasteful number, since it uses less digits than its factorization.

2231631616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13929 (or 13915 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 2231631616 is about 47240.1483486240. The cubic root of 2231631616 is about 1306.7951134780.

Adding to 2231631616 its reverse (6161361322), we get a palindrome (8392992938).

The spelling of 2231631616 in words is "two billion, two hundred thirty-one million, six hundred thirty-one thousand, six hundred sixteen".