131134515621 has 16 divisors (see below), whose sum is σ = 180891177600. Its totient is φ = 84400964928.

The previous prime is 131134515599. The next prime is 131134515637. The reversal of 131134515621 is 126515431131.

It is a happy number.

It is not a de Polignac number, because 131134515621 - 2¹⁰ = 131134514597 is a prime.

It is a super-2 number, since 2×131134515621² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131134515671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026015 + ... + 1146723.

It is an arithmetic number, because the mean of its divisors is an integer number (11305698600).

Almost surely, 2^131134515621 is an apocalyptic number.

It is an amenable number.

131134515621 is a deficient number, since it is larger than the sum of its proper divisors (49756661979).

131134515621 is a wasteful number, since it uses less digits than its factorization.

131134515621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133228.

The product of its digits is 10800, while the sum is 33.

Adding to 131134515621 its reverse (126515431131), we get a palindrome (257649946752).

The spelling of 131134515621 in words is "one hundred thirty-one billion, one hundred thirty-four million, five hundred fifteen thousand, six hundred twenty-one".