136522221 has 8 divisors (see below), whose sum is σ = 198577824. Its totient is φ = 82740720.

The previous prime is 136522219. The next prime is 136522231. The reversal of 136522221 is 122225631.

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

It is not a de Polignac number, because 136522221 - 2¹ = 136522219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136522191 and 136522200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136522231) 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 7 ways as a sum of consecutive naturals, for example, 2068486 + ... + 2068551.

It is an arithmetic number, because the mean of its divisors is an integer number (24822228).

Almost surely, 2^136522221 is an apocalyptic number.

136522221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136522221 is a deficient number, since it is larger than the sum of its proper divisors (62055603).

136522221 is a wasteful number, since it uses less digits than its factorization.

136522221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137051.

The product of its digits is 1440, while the sum is 24.

The square root of 136522221 is about 11684.2723778591. The cubic root of 136522221 is about 514.9137015671.

Adding to 136522221 its reverse (122225631), we get a palindrome (258747852).

The spelling of 136522221 in words is "one hundred thirty-six million, five hundred twenty-two thousand, two hundred twenty-one".