2106531243 has 6 divisors (see below), whose sum is σ = 3042767364. Its totient is φ = 1404354156.

The previous prime is 2106531241. The next prime is 2106531247. The reversal of 2106531243 is 3421356012.

2106531243 is a `hidden beast` number, since 2 + 1 + 0 + 653 + 1 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 2106531243 - 2¹ = 2106531241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2106531241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117029505 + ... + 117029522.

It is an arithmetic number, because the mean of its divisors is an integer number (507127894).

Almost surely, 2^2106531243 is an apocalyptic number.

2106531243 is a deficient number, since it is larger than the sum of its proper divisors (936236121).

2106531243 is a wasteful number, since it uses less digits than its factorization.

2106531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234059033 (or 234059030 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2106531243 is about 45896.9633309220. The cubic root of 2106531243 is about 1281.9053741764.

Adding to 2106531243 its reverse (3421356012), we get a palindrome (5527887255).

The spelling of 2106531243 in words is "two billion, one hundred six million, five hundred thirty-one thousand, two hundred forty-three".