136322521 has 2 divisors, whose sum is σ = 136322522. Its totient is φ = 136322520.

The previous prime is 136322497. The next prime is 136322561. The reversal of 136322521 is 125223631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89208025 + 47114496 = 9445^2 + 6864^2 .

It is a cyclic number.

It is not a de Polignac number, because 136322521 - 2⁵ = 136322489 is a prime.

It is not a weakly prime, because it can be changed into another prime (136322561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68161260 + 68161261.

It is an arithmetic number, because the mean of its divisors is an integer number (68161261).

Almost surely, 2^136322521 is an apocalyptic number.

It is an amenable number.

136322521 is a deficient number, since it is larger than the sum of its proper divisors (1).

136322521 is an equidigital number, since it uses as much as digits as its factorization.

136322521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 136322521 is about 11675.7235750081. The cubic root of 136322521 is about 514.6625130448.

The spelling of 136322521 in words is "one hundred thirty-six million, three hundred twenty-two thousand, five hundred twenty-one".