2131542533 has 4 divisors (see below), whose sum is σ = 2132008428. Its totient is φ = 2131076640.

The previous prime is 2131542521. The next prime is 2131542541. The reversal of 2131542533 is 3352451312.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1357701409 + 773841124 = 36847^2 + 27818^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131542533 - 2⁸ = 2131542277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131542496 and 2131542505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131542593) 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, 226016 + ... + 235257.

It is an arithmetic number, because the mean of its divisors is an integer number (533002107).

Almost surely, 2^2131542533 is an apocalyptic number.

It is an amenable number.

2131542533 is a deficient number, since it is larger than the sum of its proper divisors (465895).

2131542533 is an equidigital number, since it uses as much as digits as its factorization.

2131542533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465894.

The product of its digits is 10800, while the sum is 29.

The square root of 2131542533 is about 46168.6314828586. The cubic root of 2131542533 is about 1286.9588705715.

Adding to 2131542533 its reverse (3352451312), we get a palindrome (5483993845).

The spelling of 2131542533 in words is "two billion, one hundred thirty-one million, five hundred forty-two thousand, five hundred thirty-three".