2112531231 has 32 divisors (see below), whose sum is σ = 3089000448. Its totient is φ = 1278932480.

The previous prime is 2112531229. The next prime is 2112531257. The reversal of 2112531231 is 1321352112.

It is a cyclic number.

It is not a de Polignac number, because 2112531231 - 2¹ = 2112531229 is a prime.

It is a super-3 number, since 3×2112531231³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2112531198 and 2112531207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112531221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163981 + ... + 176393.

It is an arithmetic number, because the mean of its divisors is an integer number (96531264).

Almost surely, 2^2112531231 is an apocalyptic number.

2112531231 is a deficient number, since it is larger than the sum of its proper divisors (976469217).

2112531231 is a wasteful number, since it uses less digits than its factorization.

2112531231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551.

The product of its digits is 360, while the sum is 21.

The square root of 2112531231 is about 45962.2805243604. The cubic root of 2112531231 is about 1283.1212950555.

Adding to 2112531231 its reverse (1321352112), we get a palindrome (3433883343).

The spelling of 2112531231 in words is "two billion, one hundred twelve million, five hundred thirty-one thousand, two hundred thirty-one".