65221343 has 16 divisors (see below), whose sum is σ = 73543680. Its totient is φ = 57319200.

The previous prime is 65221313. The next prime is 65221369. The reversal of 65221343 is 34312256.

It is a cyclic number.

It is not a de Polignac number, because 65221343 - 2¹⁰ = 65220319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77318 + ... + 78156.

It is an arithmetic number, because the mean of its divisors is an integer number (4596480).

Almost surely, 2^65221343 is an apocalyptic number.

65221343 is a deficient number, since it is larger than the sum of its proper divisors (8322337).

65221343 is a wasteful number, since it uses less digits than its factorization.

65221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078.

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

The square root of 65221343 is about 8075.9731921299. The cubic root of 65221343 is about 402.5284482805.

Adding to 65221343 its reverse (34312256), we get a palindrome (99533599).

It can be divided in two parts, 652213 and 43, that added together give a palindrome (652256).

The spelling of 65221343 in words is "sixty-five million, two hundred twenty-one thousand, three hundred forty-three".