136522217 has 8 divisors (see below), whose sum is σ = 147788424. Its totient is φ = 125365248.

The previous prime is 136522187. The next prime is 136522219. The reversal of 136522217 is 712225631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1125721 + 135396496 = 1061^2 + 11636^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136522217 - 2⁸ = 136521961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136522217.

It is not an unprimeable number, because it can be changed into a prime (136522219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24698 + ... + 29715.

It is an arithmetic number, because the mean of its divisors is an integer number (18473553).

Almost surely, 2^136522217 is an apocalyptic number.

It is an amenable number.

136522217 is a deficient number, since it is larger than the sum of its proper divisors (11266207).

136522217 is a wasteful number, since it uses less digits than its factorization.

136522217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54619.

The product of its digits is 5040, while the sum is 29.

The square root of 136522217 is about 11684.2722066888. The cubic root of 136522217 is about 514.9136965382.

Adding to 136522217 its reverse (712225631), we get a palindrome (848747848).

The spelling of 136522217 in words is "one hundred thirty-six million, five hundred twenty-two thousand, two hundred seventeen".