65436321 has 4 divisors (see below), whose sum is σ = 87248432. Its totient is φ = 43624212.

The previous prime is 65436317. The next prime is 65436331. The reversal of 65436321 is 12363456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65436321 - 2² = 65436317 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65436331) 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, 10906051 + ... + 10906056.

It is an arithmetic number, because the mean of its divisors is an integer number (21812108).

Almost surely, 2^65436321 is an apocalyptic number.

It is an amenable number.

65436321 is a deficient number, since it is larger than the sum of its proper divisors (21812111).

65436321 is a wasteful number, since it uses less digits than its factorization.

65436321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21812110.

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

The square root of 65436321 is about 8089.2719697140. The cubic root of 65436321 is about 402.9702252301.

Adding to 65436321 its reverse (12363456), we get a palindrome (77799777).

The spelling of 65436321 in words is "sixty-five million, four hundred thirty-six thousand, three hundred twenty-one".