65136243 has 8 divisors (see below), whose sum is σ = 89195728. Its totient is φ = 42250464.

The previous prime is 65136223. The next prime is 65136259. The reversal of 65136243 is 34263156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65136243 - 2⁹ = 65135731 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 65136243.

It is not an unprimeable number, because it can be changed into a prime (65136223) 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, 293296 + ... + 293517.

It is an arithmetic number, because the mean of its divisors is an integer number (11149466).

Almost surely, 2^65136243 is an apocalyptic number.

65136243 is a deficient number, since it is larger than the sum of its proper divisors (24059485).

65136243 is a wasteful number, since it uses less digits than its factorization.

65136243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586853.

The product of its digits is 12960, while the sum is 30.

The square root of 65136243 is about 8070.7027575051. The cubic root of 65136243 is about 402.3533007048.

Adding to 65136243 its reverse (34263156), we get a palindrome (99399399).

The spelling of 65136243 in words is "sixty-five million, one hundred thirty-six thousand, two hundred forty-three".