65221433 has 4 divisors (see below), whose sum is σ = 68654160. Its totient is φ = 61788708.

The previous prime is 65221423. The next prime is 65221439. The reversal of 65221433 is 33412256.

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 a cyclic number.

It is not a de Polignac number, because 65221433 - 2⁶ = 65221369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65221439) 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, 1716335 + ... + 1716372.

It is an arithmetic number, because the mean of its divisors is an integer number (17163540).

Almost surely, 2^65221433 is an apocalyptic number.

It is an amenable number.

65221433 is a deficient number, since it is larger than the sum of its proper divisors (3432727).

65221433 is a wasteful number, since it uses less digits than its factorization.

65221433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432726.

The product of its digits is 4320, while the sum is 26.

The square root of 65221433 is about 8075.9787642118. The cubic root of 65221433 is about 402.5286334323.

Adding to 65221433 its reverse (33412256), we get a palindrome (98633689).

The spelling of 65221433 in words is "sixty-five million, two hundred twenty-one thousand, four hundred thirty-three".