220240215 has 80 divisors (see below), whose sum is σ = 432986400. Its totient is φ = 106437888.

The previous prime is 220240211. The next prime is 220240217. The reversal of 220240215 is 512042022.

It is not a de Polignac number, because 220240215 - 2² = 220240211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220240211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 310281 + ... + 310989.

It is an arithmetic number, because the mean of its divisors is an integer number (5412330).

Almost surely, 2^220240215 is an apocalyptic number.

220240215 is a deficient number, since it is larger than the sum of its proper divisors (212746185).

220240215 is a wasteful number, since it uses less digits than its factorization.

220240215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 220240215 is about 14840.4924109680. The cubic root of 220240215 is about 603.9007108037.

Adding to 220240215 its reverse (512042022), we get a palindrome (732282237).

The spelling of 220240215 in words is "two hundred twenty million, two hundred forty thousand, two hundred fifteen".