2112157272 has 64 divisors (see below), whose sum is σ = 5448384000. Its totient is φ = 681992064.

The previous prime is 2112157217. The next prime is 2112157277. The reversal of 2112157272 is 2727512112.

It is a super-2 number, since 2×2112157272² = 8922416683324963968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112157277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89979 + ... + 110997.

It is an arithmetic number, because the mean of its divisors is an integer number (85131000).

Almost surely, 2^2112157272 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 2112157272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2724192000).

2112157272 is an abundant number, since it is smaller than the sum of its proper divisors (3336226728).

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

2112157272 is a wasteful number, since it uses less digits than its factorization.

2112157272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21160 (or 21156 counting only the distinct ones).

The product of its digits is 3920, while the sum is 30.

The square root of 2112157272 is about 45958.2122367700. The cubic root of 2112157272 is about 1283.0455781358.

Adding to 2112157272 its reverse (2727512112), we get a palindrome (4839669384).

The spelling of 2112157272 in words is "two billion, one hundred twelve million, one hundred fifty-seven thousand, two hundred seventy-two".