64221589 has 8 divisors (see below), whose sum is σ = 67187520. Its totient is φ = 61270176.

The previous prime is 64221587. The next prime is 64221611. The reversal of 64221589 is 98512246.

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

It is a cyclic number.

It is not a de Polignac number, because 64221589 - 2¹ = 64221587 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 (64221583) 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, 5994 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (8398440).

Almost surely, 2^64221589 is an apocalyptic number.

It is an amenable number.

64221589 is a deficient number, since it is larger than the sum of its proper divisors (2965931).

64221589 is a wasteful number, since it uses less digits than its factorization.

64221589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259.

The product of its digits is 34560, while the sum is 37.

The square root of 64221589 is about 8013.8373454919. The cubic root of 64221589 is about 400.4611119851.

The spelling of 64221589 in words is "sixty-four million, two hundred twenty-one thousand, five hundred eighty-nine".