64021227 has 4 divisors (see below), whose sum is σ = 85361640. Its totient is φ = 42680816.

The previous prime is 64021189. The next prime is 64021229. The reversal of 64021227 is 72212046.

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 64021227 - 2²⁴ = 47244011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64021197 and 64021206.

It is not an unprimeable number, because it can be changed into a prime (64021229) 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, 10670202 + ... + 10670207.

It is an arithmetic number, because the mean of its divisors is an integer number (21340410).

Almost surely, 2^64021227 is an apocalyptic number.

64021227 is a deficient number, since it is larger than the sum of its proper divisors (21340413).

64021227 is a wasteful number, since it uses less digits than its factorization.

64021227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21340412.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 64021227 is about 8001.3265775120. The cubic root of 64021227 is about 400.0442180284.

The spelling of 64021227 in words is "sixty-four million, twenty-one thousand, two hundred twenty-seven".