131520252433 has 4 divisors (see below), whose sum is σ = 131521016628. Its totient is φ = 131519488240.

The previous prime is 131520252401. The next prime is 131520252467. The reversal of 131520252433 is 334252025131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 334252025131 = 19 ⋅17592211849.

It can be written as a sum of positive squares in 2 ways, for example, as 20422696464 + 111097555969 = 142908^2 + 333313^2 .

It is a cyclic number.

It is not a de Polignac number, because 131520252433 - 2⁵ = 131520252401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131520252395 and 131520252404.

It is not an unprimeable number, because it can be changed into a prime (131520253433) 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, 10563 + ... + 512983.

It is an arithmetic number, because the mean of its divisors is an integer number (32880254157).

Almost surely, 2^131520252433 is an apocalyptic number.

It is an amenable number.

131520252433 is a deficient number, since it is larger than the sum of its proper divisors (764195).

131520252433 is an equidigital number, since it uses as much as digits as its factorization.

131520252433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764194.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 131520252433 its reverse (334252025131), we get a palindrome (465772277564).

The spelling of 131520252433 in words is "one hundred thirty-one billion, five hundred twenty million, two hundred fifty-two thousand, four hundred thirty-three".