2131528243 has 16 divisors (see below), whose sum is σ = 2521370880. Its totient is φ = 1782959904.

The previous prime is 2131528237. The next prime is 2131528253. The reversal of 2131528243 is 3428251312.

It is a cyclic number.

It is not a de Polignac number, because 2131528243 - 2⁵ = 2131528211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131528253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181921 + ... + 193282.

It is an arithmetic number, because the mean of its divisors is an integer number (157585680).

Almost surely, 2^2131528243 is an apocalyptic number.

2131528243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2131528243 is a deficient number, since it is larger than the sum of its proper divisors (389842637).

2131528243 is a wasteful number, since it uses less digits than its factorization.

2131528243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375258.

The product of its digits is 11520, while the sum is 31.

The square root of 2131528243 is about 46168.4767238426. The cubic root of 2131528243 is about 1286.9559946130.

Adding to 2131528243 its reverse (3428251312), we get a palindrome (5559779555).

The spelling of 2131528243 in words is "two billion, one hundred thirty-one million, five hundred twenty-eight thousand, two hundred forty-three".