64900221 has 8 divisors (see below), whose sum is σ = 86571264. Its totient is φ = 43248000.

The previous prime is 64900217. The next prime is 64900223. The reversal of 64900221 is 12200946.

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

It is not a de Polignac number, because 64900221 - 2² = 64900217 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64900191 and 64900200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64900223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9300 + ... + 14706.

It is an arithmetic number, because the mean of its divisors is an integer number (10821408).

Almost surely, 2^64900221 is an apocalyptic number.

It is an amenable number.

64900221 is a deficient number, since it is larger than the sum of its proper divisors (21671043).

64900221 is a wasteful number, since it uses less digits than its factorization.

64900221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9411.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 64900221 is about 8056.0673408308. The cubic root of 64900221 is about 401.8667351146.

The spelling of 64900221 in words is "sixty-four million, nine hundred thousand, two hundred twenty-one".