418016221 has 8 divisors (see below), whose sum is σ = 478463040. Its totient is φ = 357751968.

The previous prime is 418016219. The next prime is 418016231. The reversal of 418016221 is 122610814.

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

It is not a de Polignac number, because 418016221 - 2¹ = 418016219 is a prime.

It is a super-2 number, since 2×418016221² = 349475122038241682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418016231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40696 + ... + 49921.

It is an arithmetic number, because the mean of its divisors is an integer number (59807880).

Almost surely, 2^418016221 is an apocalyptic number.

It is an amenable number.

418016221 is a deficient number, since it is larger than the sum of its proper divisors (60446819).

418016221 is an equidigital number, since it uses as much as digits as its factorization.

418016221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91283.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 418016221 is about 20445.4449939345. Note that the first 3 decimals coincide. The cubic root of 418016221 is about 747.7063086054.

The spelling of 418016221 in words is "four hundred eighteen million, sixteen thousand, two hundred twenty-one".