131515155344525 has 12 divisors (see below), whose sum is σ = 163224789790452. Its totient is φ = 105117932557440.

The previous prime is 131515155344519. The next prime is 131515155344527. The reversal of 131515155344525 is 525443551515131.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8514146245801 + 123001009098724 = 2917901^2 + 11090582^2 .

It is not a de Polignac number, because 131515155344525 - 2⁴⁶ = 61146411166861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131515155344527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2354764472 + ... + 2354820321.

It is an arithmetic number, because the mean of its divisors is an integer number (13602065815871).

Almost surely, 2^{131515155344525} is an apocalyptic number.

It is an amenable number.

131515155344525 is a deficient number, since it is larger than the sum of its proper divisors (31709634445927).

131515155344525 is a wasteful number, since it uses less digits than its factorization.

131515155344525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709585920 (or 4709585915 counting only the distinct ones).

The product of its digits is 4500000, while the sum is 50.

The spelling of 131515155344525 in words is "one hundred thirty-one trillion, five hundred fifteen billion, one hundred fifty-five million, three hundred forty-four thousand, five hundred twenty-five".