136515261 has 4 divisors (see below), whose sum is σ = 182020352. Its totient is φ = 91010172.

The previous prime is 136515257. The next prime is 136515277. The reversal of 136515261 is 162515631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 136515261 - 2² = 136515257 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 (136515061) 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, 22752541 + ... + 22752546.

It is an arithmetic number, because the mean of its divisors is an integer number (45505088).

Almost surely, 2^136515261 is an apocalyptic number.

It is an amenable number.

136515261 is a deficient number, since it is larger than the sum of its proper divisors (45505091).

136515261 is an equidigital number, since it uses as much as digits as its factorization.

136515261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45505090.

The product of its digits is 5400, while the sum is 30.

The square root of 136515261 is about 11683.9745378018. The cubic root of 136515261 is about 514.9049511960.

The spelling of 136515261 in words is "one hundred thirty-six million, five hundred fifteen thousand, two hundred sixty-one".