136442231 has 4 divisors (see below), whose sum is σ = 136881264. Its totient is φ = 136003200.

The previous prime is 136442179. The next prime is 136442239. The reversal of 136442231 is 132244631.

136442231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132244631 = 131 ⋅1009501.

It is a cyclic number.

It is not a de Polignac number, because 136442231 - 2¹⁴ = 136425847 is a prime.

It is a super-2 number, since 2×136442231² = 37232964800514722, which contains 22 as substring.

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 136442231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136442239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219050 + ... + 219671.

It is an arithmetic number, because the mean of its divisors is an integer number (34220316).

Almost surely, 2^136442231 is an apocalyptic number.

136442231 is a deficient number, since it is larger than the sum of its proper divisors (439033).

136442231 is an equidigital number, since it uses as much as digits as its factorization.

136442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439032.

The product of its digits is 3456, while the sum is 26.

The square root of 136442231 is about 11680.8488989457. The cubic root of 136442231 is about 514.8131172239.

Adding to 136442231 its reverse (132244631), we get a palindrome (268686862).

The spelling of 136442231 in words is "one hundred thirty-six million, four hundred forty-two thousand, two hundred thirty-one".