131521422313 has 4 divisors (see below), whose sum is σ = 132525402768. Its totient is φ = 130517441860.

The previous prime is 131521422293. The next prime is 131521422317. The reversal of 131521422313 is 313224125131.

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 an emirpimes, since its reverse is a distinct semiprime: 313224125131 = 251 ⋅1247904881.

It is a cyclic number.

It is not a de Polignac number, because 131521422313 - 2⁵ = 131521422281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131521422317) 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, 501990031 + ... + 501990292.

It is an arithmetic number, because the mean of its divisors is an integer number (33131350692).

Almost surely, 2^131521422313 is an apocalyptic number.

It is an amenable number.

131521422313 is a deficient number, since it is larger than the sum of its proper divisors (1003980455).

131521422313 is a wasteful number, since it uses less digits than its factorization.

131521422313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003980454.

The product of its digits is 4320, while the sum is 28.

Adding to 131521422313 its reverse (313224125131), we get a palindrome (444745547444).

The spelling of 131521422313 in words is "one hundred thirty-one billion, five hundred twenty-one million, four hundred twenty-two thousand, three hundred thirteen".