131520431153453 has 4 divisors (see below), whose sum is σ = 131520454424028. Its totient is φ = 131520407882880.

The previous prime is 131520431153443. The next prime is 131520431153483. The reversal of 131520431153453 is 354351134025131.

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 54331080805444 + 77189350348009 = 7370962^2 + 8785747^2 .

It is a cyclic number.

It is not a de Polignac number, because 131520431153453 - 2⁶ = 131520431153389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131520431153453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131520431153413) 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, 2870813 + ... + 16470653.

It is an arithmetic number, because the mean of its divisors is an integer number (32880113606007).

Almost surely, 2^{131520431153453} is an apocalyptic number.

It is an amenable number.

131520431153453 is a deficient number, since it is larger than the sum of its proper divisors (23270575).

131520431153453 is an equidigital number, since it uses as much as digits as its factorization.

131520431153453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23270574.

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 131520431153453 its reverse (354351134025131), we get a palindrome (485871565178584).

The spelling of 131520431153453 in words is "one hundred thirty-one trillion, five hundred twenty billion, four hundred thirty-one million, one hundred fifty-three thousand, four hundred fifty-three".