220515 has 16 divisors (see below), whose sum is σ = 360096. Its totient is φ = 115200.

The previous prime is 220513. The next prime is 220529. The reversal of 220515 is 515022.

220515 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 220515 - 2¹ = 220513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁷ + 5⁵ + 0 + 1 + 5⁷ .

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 220494 and 220503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (22506).

2²²⁰⁵¹⁵ is an apocalyptic number.

220515 is a deficient number, since it is larger than the sum of its proper divisors (139581).

220515 is a wasteful number, since it uses less digits than its factorization.

220515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 220515 is about 469.5902469175. The cubic root of 220515 is about 60.4151760763.

Adding to 220515 its reverse (515022), we get a palindrome (735537).

The spelling of 220515 in words is "two hundred twenty thousand, five hundred fifteen".