136187231 has 8 divisors (see below), whose sum is σ = 145171200. Its totient is φ = 127384920.

The previous prime is 136187189. The next prime is 136187243. The reversal of 136187231 is 132781631.

136187231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 136187231 - 2⁶ = 136187167 is a prime.

It is a super-2 number, since 2×136187231² = 37093923774894722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136187251) 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, 43865 + ... + 46866.

It is an arithmetic number, because the mean of its divisors is an integer number (18146400).

Almost surely, 2^136187231 is an apocalyptic number.

136187231 is a deficient number, since it is larger than the sum of its proper divisors (8983969).

136187231 is an equidigital number, since it uses as much as digits as its factorization.

136187231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90829.

The product of its digits is 6048, while the sum is 32.

The square root of 136187231 is about 11669.9284916404. The cubic root of 136187231 is about 514.4922018901.

The spelling of 136187231 in words is "one hundred thirty-six million, one hundred eighty-seven thousand, two hundred thirty-one".