164442215 has 8 divisors (see below), whose sum is σ = 225520800. Its totient is φ = 112760352.

The previous prime is 164442181. The next prime is 164442227. The reversal of 164442215 is 512244461.

164442215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-164442215 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349140 + ... + 2349209.

It is an arithmetic number, because the mean of its divisors is an integer number (28190100).

Almost surely, 2^164442215 is an apocalyptic number.

164442215 is a deficient number, since it is larger than the sum of its proper divisors (61078585).

164442215 is an equidigital number, since it uses as much as digits as its factorization.

164442215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698361.

The product of its digits is 7680, while the sum is 29.

The square root of 164442215 is about 12823.5024466797. The cubic root of 164442215 is about 547.8619084358.

Adding to 164442215 its reverse (512244461), we get a palindrome (676686676).

The spelling of 164442215 in words is "one hundred sixty-four million, four hundred forty-two thousand, two hundred fifteen".