2112531 has 4 divisors (see below), whose sum is σ = 2816712. Its totient is φ = 1408352.

The previous prime is 2112511. The next prime is 2112533. The reversal of 2112531 is 1352112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2112531 - 2⁵ = 2112499 is a prime.

It is a super-2 number, since 2×2112531² = 8925574451922, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112531.

It is not an unprimeable number, because it can be changed into a prime (2112533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352086 + ... + 352091.

It is an arithmetic number, because the mean of its divisors is an integer number (704178).

2^2112531 is an apocalyptic number.

2112531 is a deficient number, since it is larger than the sum of its proper divisors (704181).

2112531 is an equidigital number, since it uses as much as digits as its factorization.

2112531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704180.

The product of its digits is 60, while the sum is 15.

The square root of 2112531 is about 1453.4548496599. The cubic root of 2112531 is about 128.3121248287.

Adding to 2112531 its reverse (1352112), we get a palindrome (3464643).

The spelling of 2112531 in words is "two million, one hundred twelve thousand, five hundred thirty-one".