64024221 has 4 divisors (see below), whose sum is σ = 85365632.
Its totient is φ = 42682812.
The previous prime is 64024217. The next prime is 64024229. The reversal of 64024221 is 12242046.
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 not a de Polignac number, because 64024221 - 22 = 64024217 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 (64024229) 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, 10670701 + ... + 10670706.
It is an arithmetic number, because the mean of its divisors is an integer number (21341408).
Almost surely, 264024221 is an apocalyptic number.
It is an amenable number.
64024221 is a deficient number, since it is larger than the sum of its proper divisors (21341411).
64024221 is a wasteful number, since it uses less digits than its factorization.
64024221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21341410.
The product of its (nonzero) digits is 768, while the sum is 21.
The square root of 64024221 is about 8001.5136693003.
The cubic root of 64024221 is about 400.0504540524.
Adding to 64024221 its reverse (12242046), we get a palindrome (76266267).
The spelling of 64024221 in words is "sixty-four million, twenty-four thousand, two hundred twenty-one".