136285221 has 8 divisors (see below), whose sum is σ = 184793760. Its totient is φ = 89316752.

The previous prime is 136285211. The next prime is 136285231. The reversal of 136285221 is 122582631.

It is an interprime number because it is at equal distance from previous prime (136285211) and next prime (136285231).

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 136285221 - 2¹⁸ = 136023077 is a prime.

It is a super-2 number, since 2×136285221² = 37147322926037682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136285211) 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, 384810 + ... + 385163.

It is an arithmetic number, because the mean of its divisors is an integer number (23099220).

Almost surely, 2^136285221 is an apocalyptic number.

It is an amenable number.

136285221 is a deficient number, since it is larger than the sum of its proper divisors (48508539).

136285221 is an equidigital number, since it uses as much as digits as its factorization.

136285221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770035.

The product of its digits is 5760, while the sum is 30.

The square root of 136285221 is about 11674.1261343194. The cubic root of 136285221 is about 514.6155688257.

The spelling of 136285221 in words is "one hundred thirty-six million, two hundred eighty-five thousand, two hundred twenty-one".