131515609063 has 4 divisors (see below), whose sum is σ = 131516439040. Its totient is φ = 131514779088.

The previous prime is 131515609061. The next prime is 131515609073. The reversal of 131515609063 is 360906515131.

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: 360906515131 = 97 ⋅3720685723.

It is a cyclic number.

It is not a de Polignac number, because 131515609063 - 2¹ = 131515609061 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 (131515609061) 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, 95118 + ... + 521611.

It is an arithmetic number, because the mean of its divisors is an integer number (32879109760).

Almost surely, 2^131515609063 is an apocalyptic number.

131515609063 is a deficient number, since it is larger than the sum of its proper divisors (829977).

131515609063 is an equidigital number, since it uses as much as digits as its factorization.

131515609063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829976.

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 131515609063 in words is "one hundred thirty-one billion, five hundred fifteen million, six hundred nine thousand, sixty-three".