136186221 has 8 divisors (see below), whose sum is σ = 184558624. Its totient is φ = 89302320.

The previous prime is 136186207. The next prime is 136186229. The reversal of 136186221 is 122681631.

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

It is not a de Polignac number, because 136186221 - 2⁷ = 136186093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136186229) 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, 371911 + ... + 372276.

It is an arithmetic number, because the mean of its divisors is an integer number (23069828).

Almost surely, 2^136186221 is an apocalyptic number.

It is an amenable number.

136186221 is a deficient number, since it is larger than the sum of its proper divisors (48372403).

136186221 is an equidigital number, since it uses as much as digits as its factorization.

136186221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744251.

The product of its digits is 3456, while the sum is 30.

The square root of 136186221 is about 11669.8852179445. The cubic root of 136186221 is about 514.4909300175.

The spelling of 136186221 in words is "one hundred thirty-six million, one hundred eighty-six thousand, two hundred twenty-one".