131540533 has 4 divisors (see below), whose sum is σ = 135783808. Its totient is φ = 127297260.

The previous prime is 131540531. The next prime is 131540537. The reversal of 131540533 is 335045131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131540533 - 2¹ = 131540531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131540498 and 131540507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131540531) 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, 2121591 + ... + 2121652.

It is an arithmetic number, because the mean of its divisors is an integer number (33945952).

Almost surely, 2^131540533 is an apocalyptic number.

It is an amenable number.

131540533 is a deficient number, since it is larger than the sum of its proper divisors (4243275).

131540533 is an equidigital number, since it uses as much as digits as its factorization.

131540533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243274.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 131540533 is about 11469.1121277979. The cubic root of 131540533 is about 508.5728819785.

Adding to 131540533 its reverse (335045131), we get a palindrome (466585664).

The spelling of 131540533 in words is "one hundred thirty-one million, five hundred forty thousand, five hundred thirty-three".