65213223 has 4 divisors (see below), whose sum is σ = 86950968. Its totient is φ = 43475480.

The previous prime is 65213221. The next prime is 65213227. The reversal of 65213223 is 32231256.

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 65213223 - 2¹ = 65213221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65213193 and 65213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65213221) 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, 10868868 + ... + 10868873.

It is an arithmetic number, because the mean of its divisors is an integer number (21737742).

Almost surely, 2^65213223 is an apocalyptic number.

65213223 is a deficient number, since it is larger than the sum of its proper divisors (21737745).

65213223 is a wasteful number, since it uses less digits than its factorization.

65213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21737744.

The product of its digits is 2160, while the sum is 24.

The square root of 65213223 is about 8075.4704506920. The cubic root of 65213223 is about 402.5117427743.

Adding to 65213223 its reverse (32231256), we get a palindrome (97444479).

The spelling of 65213223 in words is "sixty-five million, two hundred thirteen thousand, two hundred twenty-three".