220421513 has 8 divisors (see below), whose sum is σ = 237606600. Its totient is φ = 203269248.

The previous prime is 220421441. The next prime is 220421519. The reversal of 220421513 is 315124022.

220421513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1026169 + 219395344 = 1013^2 + 14812^2 .

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

It is not a de Polignac number, because 220421513 - 2¹⁰ = 220420489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220421519) 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, 6773 + ... + 22061.

It is an arithmetic number, because the mean of its divisors is an integer number (29700825).

Almost surely, 2^220421513 is an apocalyptic number.

It is an amenable number.

220421513 is a deficient number, since it is larger than the sum of its proper divisors (17185087).

220421513 is a wasteful number, since it uses less digits than its factorization.

220421513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 220421513 is about 14846.5993749411. The cubic root of 220421513 is about 604.0663722875.

Adding to 220421513 its reverse (315124022), we get a palindrome (535545535).

The spelling of 220421513 in words is "two hundred twenty million, four hundred twenty-one thousand, five hundred thirteen".