220405215 has 8 divisors (see below), whose sum is σ = 352648368. Its totient is φ = 117549440.

The previous prime is 220405193. The next prime is 220405219. The reversal of 220405215 is 512504022.

It is a happy number.

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

It is not a de Polignac number, because 220405215 - 2⁵ = 220405183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220405191 and 220405200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220405219) 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, 7346826 + ... + 7346855.

It is an arithmetic number, because the mean of its divisors is an integer number (44081046).

Almost surely, 2^220405215 is an apocalyptic number.

220405215 is a deficient number, since it is larger than the sum of its proper divisors (132243153).

220405215 is a wasteful number, since it uses less digits than its factorization.

220405215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14693689.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 220405215 is about 14846.0504848933. The cubic root of 220405215 is about 604.0514836676.

Adding to 220405215 its reverse (512504022), we get a palindrome (732909237).

The spelling of 220405215 in words is "two hundred twenty million, four hundred five thousand, two hundred fifteen".