65224321 has 8 divisors (see below), whose sum is σ = 68838080. Its totient is φ = 61628688.

The previous prime is 65224319. The next prime is 65224331. The reversal of 65224321 is 12342256.

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

It is a cyclic number.

It is not a de Polignac number, because 65224321 - 2¹ = 65224319 is a prime.

It is a super-2 number, since 2×65224321² = 8508424099822082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65224301) 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, 3220 + ... + 11866.

It is an arithmetic number, because the mean of its divisors is an integer number (8604760).

Almost surely, 2^65224321 is an apocalyptic number.

It is an amenable number.

65224321 is a deficient number, since it is larger than the sum of its proper divisors (3613759).

65224321 is a wasteful number, since it uses less digits than its factorization.

65224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063.

The product of its digits is 2880, while the sum is 25.

The square root of 65224321 is about 8076.1575640895. The cubic root of 65224321 is about 402.5345746569.

Adding to 65224321 its reverse (12342256), we get a palindrome (77566577).

The spelling of 65224321 in words is "sixty-five million, two hundred twenty-four thousand, three hundred twenty-one".