64022021 has 8 divisors (see below), whose sum is σ = 74408640. Its totient is φ = 53945568.

The previous prime is 64022011. The next prime is 64022027. The reversal of 64022021 is 12022046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64022021 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 (64022027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77096 + ... + 77921.

It is an arithmetic number, because the mean of its divisors is an integer number (9301080).

Almost surely, 2^64022021 is an apocalyptic number.

It is an amenable number.

64022021 is a deficient number, since it is larger than the sum of its proper divisors (10386619).

64022021 is a wasteful number, since it uses less digits than its factorization.

64022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155083.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 64022021 is about 8001.3761941306. The cubic root of 64022021 is about 400.0458718226.

Adding to 64022021 its reverse (12022046), we get a palindrome (76044067).

The spelling of 64022021 in words is "sixty-four million, twenty-two thousand, twenty-one".