64222500 has 60 divisors (see below), whose sum is σ = 187277552. Its totient is φ = 17124000.

The previous prime is 64222471. The next prime is 64222507. The reversal of 64222500 is 522246.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (64222507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3219 + ... + 11781.

Almost surely, 2^64222500 is an apocalyptic number.

64222500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64222500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93638776).

64222500 is an abundant number, since it is smaller than the sum of its proper divisors (123055052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64222500 is a wasteful number, since it uses less digits than its factorization.

64222500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8590 (or 8573 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 64222500 is about 8013.8941844774. The cubic root of 64222500 is about 400.4630055246.

Adding to 64222500 its reverse (522246), we get a palindrome (64744746).

The spelling of 64222500 in words is "sixty-four million, two hundred twenty-two thousand, five hundred".