2151222332 has 48 divisors (see below), whose sum is σ = 4596560640. Its totient is φ = 860378112.

The previous prime is 2151222299. The next prime is 2151222343. The reversal of 2151222332 is 2332221512.

It is a junction number, because it is equal to n+sod(n) for n = 2151222298 and 2151222307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5468 + ... + 65820.

It is an arithmetic number, because the mean of its divisors is an integer number (95761680).

Almost surely, 2^2151222332 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 2151222332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298280320).

2151222332 is an abundant number, since it is smaller than the sum of its proper divisors (2445338308).

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

2151222332 is a wasteful number, since it uses less digits than its factorization.

2151222332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60450 (or 60448 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 2151222332 is about 46381.2713495437. The cubic root of 2151222332 is about 1290.9074263581.

Adding to 2151222332 its reverse (2332221512), we get a palindrome (4483443844).

The spelling of 2151222332 in words is "two billion, one hundred fifty-one million, two hundred twenty-two thousand, three hundred thirty-two".