221164415 has 8 divisors (see below), whose sum is σ = 267155808. Its totient is φ = 175759200.

The previous prime is 221164403. The next prime is 221164459. The reversal of 221164415 is 514461122.

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

It is not a de Polignac number, because 221164415 - 2¹⁶ = 221098879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145712 + ... + 147221.

It is an arithmetic number, because the mean of its divisors is an integer number (33394476).

Almost surely, 2^221164415 is an apocalyptic number.

221164415 is a deficient number, since it is larger than the sum of its proper divisors (45991393).

221164415 is a wasteful number, since it uses less digits than its factorization.

221164415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293089.

The product of its digits is 1920, while the sum is 26.

The square root of 221164415 is about 14871.5975940717. The cubic root of 221164415 is about 604.7442536297.

The spelling of 221164415 in words is "two hundred twenty-one million, one hundred sixty-four thousand, four hundred fifteen".