136226161 has 2 divisors, whose sum is σ = 136226162. Its totient is φ = 136226160.

The previous prime is 136226147. The next prime is 136226177. The reversal of 136226161 is 161622631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94945536 + 41280625 = 9744^2 + 6425^2 .

It is an emirp because it is prime and its reverse (161622631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136226161 - 2¹¹ = 136224113 is a prime.

It is not a weakly prime, because it can be changed into another prime (136226131) 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 as a sum of consecutive naturals, namely, 68113080 + 68113081.

It is an arithmetic number, because the mean of its divisors is an integer number (68113081).

Almost surely, 2^136226161 is an apocalyptic number.

It is an amenable number.

136226161 is a deficient number, since it is larger than the sum of its proper divisors (1).

136226161 is an equidigital number, since it uses as much as digits as its factorization.

136226161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 136226161 is about 11671.5963346922. The cubic root of 136226161 is about 514.5412208598.

Adding to 136226161 its reverse (161622631), we get a palindrome (297848792).

The spelling of 136226161 in words is "one hundred thirty-six million, two hundred twenty-six thousand, one hundred sixty-one".