164250221 has 8 divisors (see below), whose sum is σ = 165628800. Its totient is φ = 162877120.

The previous prime is 164250211. The next prime is 164250241. The reversal of 164250221 is 122052461.

It is a happy number.

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 164250221 - 2⁶ = 164250157 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 (164250211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76085 + ... + 78213.

It is an arithmetic number, because the mean of its divisors is an integer number (20703600).

Almost surely, 2^164250221 is an apocalyptic number.

It is an amenable number.

164250221 is a deficient number, since it is larger than the sum of its proper divisors (1378579).

164250221 is a wasteful number, since it uses less digits than its factorization.

164250221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 164250221 is about 12816.0142400046. The cubic root of 164250221 is about 547.6486072418.

The spelling of 164250221 in words is "one hundred sixty-four million, two hundred fifty thousand, two hundred twenty-one".