65220223 has 4 divisors (see below), whose sum is σ = 65294640. Its totient is φ = 65145808.

The previous prime is 65220173. The next prime is 65220227. The reversal of 65220223 is 32202256.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65220223 - 2¹³ = 65212031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65220194 and 65220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65220227) 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, 35878 + ... + 37651.

It is an arithmetic number, because the mean of its divisors is an integer number (16323660).

Almost surely, 2^65220223 is an apocalyptic number.

65220223 is a deficient number, since it is larger than the sum of its proper divisors (74417).

65220223 is an equidigital number, since it uses as much as digits as its factorization.

65220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74416.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 65220223 is about 8075.9038503439. The cubic root of 65220223 is about 402.5261441552.

Adding to 65220223 its reverse (32202256), we get a palindrome (97422479).

The spelling of 65220223 in words is "sixty-five million, two hundred twenty thousand, two hundred twenty-three".