136333231 has 4 divisors (see below), whose sum is σ = 138568264. Its totient is φ = 134098200.

The previous prime is 136333207. The next prime is 136333279. The reversal of 136333231 is 132333631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136333231 - 2⁹ = 136332719 is a prime.

It is a super-2 number, since 2×136333231² = 37173499749798722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136333196 and 136333205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136333291) 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, 1117425 + ... + 1117546.

It is an arithmetic number, because the mean of its divisors is an integer number (34642066).

Almost surely, 2^136333231 is an apocalyptic number.

136333231 is a deficient number, since it is larger than the sum of its proper divisors (2235033).

136333231 is an equidigital number, since it uses as much as digits as its factorization.

136333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235032.

The product of its digits is 2916, while the sum is 25.

The square root of 136333231 is about 11676.1822099520. The cubic root of 136333231 is about 514.6759906202.

Adding to 136333231 its reverse (132333631), we get a palindrome (268666862).

The spelling of 136333231 in words is "one hundred thirty-six million, three hundred thirty-three thousand, two hundred thirty-one".