220256215 has 4 divisors (see below), whose sum is σ = 264307464. Its totient is φ = 176204968.

The previous prime is 220256213. The next prime is 220256237. The reversal of 220256215 is 512652022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220256215 - 2¹ = 220256213 is a prime.

It is a super-2 number, since 2×220256215² = 97025600492252450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220256215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220256213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22025617 + ... + 22025626.

It is an arithmetic number, because the mean of its divisors is an integer number (66076866).

Almost surely, 2^220256215 is an apocalyptic number.

220256215 is a deficient number, since it is larger than the sum of its proper divisors (44051249).

220256215 is an equidigital number, since it uses as much as digits as its factorization.

220256215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44051248.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 220256215 is about 14841.0314668489. The cubic root of 220256215 is about 603.9153344990.

The spelling of 220256215 in words is "two hundred twenty million, two hundred fifty-six thousand, two hundred fifteen".