136513015 has 4 divisors (see below), whose sum is σ = 163815624. Its totient is φ = 109210408.

The previous prime is 136512997. The next prime is 136513019. The reversal of 136513015 is 510315631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510315631 = 7 ⋅72902233.

It is a cyclic number.

It is not a de Polignac number, because 136513015 - 2⁹ = 136512503 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 (136513019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13651297 + ... + 13651306.

It is an arithmetic number, because the mean of its divisors is an integer number (40953906).

Almost surely, 2^136513015 is an apocalyptic number.

136513015 is a deficient number, since it is larger than the sum of its proper divisors (27302609).

136513015 is an equidigital number, since it uses as much as digits as its factorization.

136513015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27302608.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 136513015 is about 11683.8784228526. The cubic root of 136513015 is about 514.9021273778.

Adding to 136513015 its reverse (510315631), we get a palindrome (646828646).

The spelling of 136513015 in words is "one hundred thirty-six million, five hundred thirteen thousand, fifteen".