131025435533 has 4 divisors (see below), whose sum is σ = 131026415520. Its totient is φ = 131024455548.

The previous prime is 131025435529. The next prime is 131025435553. The reversal of 131025435533 is 335534520131.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 131025435533 - 2² = 131025435529 is a prime.

It is a super-2 number, since 2×131025435533² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131025435493 and 131025435502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131025435553) 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, 250385 + ... + 569862.

It is an arithmetic number, because the mean of its divisors is an integer number (32756603880).

Almost surely, 2^131025435533 is an apocalyptic number.

It is an amenable number.

131025435533 is a deficient number, since it is larger than the sum of its proper divisors (979987).

131025435533 is an equidigital number, since it uses as much as digits as its factorization.

131025435533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979986.

The product of its (nonzero) digits is 81000, while the sum is 35.

Adding to 131025435533 its reverse (335534520131), we get a palindrome (466559955664).

The spelling of 131025435533 in words is "one hundred thirty-one billion, twenty-five million, four hundred thirty-five thousand, five hundred thirty-three".