136532321 has 16 divisors (see below), whose sum is σ = 149112576. Its totient is φ = 124513536.

The previous prime is 136532311. The next prime is 136532351. The reversal of 136532321 is 123235631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136532321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136532311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84695 + ... + 86291.

It is an arithmetic number, because the mean of its divisors is an integer number (9319536).

Almost surely, 2^136532321 is an apocalyptic number.

It is an amenable number.

136532321 is a deficient number, since it is larger than the sum of its proper divisors (12580255).

136532321 is a wasteful number, since it uses less digits than its factorization.

136532321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 3240, while the sum is 26.

The square root of 136532321 is about 11684.7045747849. The cubic root of 136532321 is about 514.9263991341.

Adding to 136532321 its reverse (123235631), we get a palindrome (259767952).

It can be divided in two parts, 13653 and 2321, that multiplied together give a palindrome (31688613).

The spelling of 136532321 in words is "one hundred thirty-six million, five hundred thirty-two thousand, three hundred twenty-one".