131320652545 has 16 divisors (see below), whose sum is σ = 161503835472. Its totient is φ = 102446218240.

The previous prime is 131320652543. The next prime is 131320652549. The reversal of 131320652545 is 545256023131.

It can be written as a sum of positive squares in 8 ways, for example, as 89157779649 + 42162872896 = 298593^2 + 205336^2 .

It is not a de Polignac number, because 131320652545 - 2¹ = 131320652543 is a prime.

It is a super-2 number, since 2×131320652545² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131320652543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292599 + ... + 590131.

It is an arithmetic number, because the mean of its divisors is an integer number (10093989717).

Almost surely, 2^131320652545 is an apocalyptic number.

It is an amenable number.

131320652545 is a deficient number, since it is larger than the sum of its proper divisors (30183182927).

131320652545 is a wasteful number, since it uses less digits than its factorization.

131320652545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299732.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 131320652545 its reverse (545256023131), we get a palindrome (676576675676).

The spelling of 131320652545 in words is "one hundred thirty-one billion, three hundred twenty million, six hundred fifty-two thousand, five hundred forty-five".