136215461 has 2 divisors, whose sum is σ = 136215462. Its totient is φ = 136215460.

The previous prime is 136215449. The next prime is 136215473. The reversal of 136215461 is 164512631.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (136215449) and next prime (136215473).

It can be written as a sum of positive squares in only one way, i.e., 128822500 + 7392961 = 11350^2 + 2719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136215461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136215491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68107730 + 68107731.

It is an arithmetic number, because the mean of its divisors is an integer number (68107731).

Almost surely, 2^136215461 is an apocalyptic number.

It is an amenable number.

136215461 is a deficient number, since it is larger than the sum of its proper divisors (1).

136215461 is an equidigital number, since it uses as much as digits as its factorization.

136215461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 136215461 is about 11671.1379479466. The cubic root of 136215461 is about 514.5277488140.

The spelling of 136215461 in words is "one hundred thirty-six million, two hundred fifteen thousand, four hundred sixty-one".