220405513 has 12 divisors (see below), whose sum is σ = 229156992. Its totient is φ = 211850240.

The previous prime is 220405499. The next prime is 220405517. The reversal of 220405513 is 315504022.

It is not a de Polignac number, because 220405513 - 2⁹ = 220405001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220405517) 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 11 ways as a sum of consecutive naturals, for example, 857481 + ... + 857737.

It is an arithmetic number, because the mean of its divisors is an integer number (19096416).

Almost surely, 2^220405513 is an apocalyptic number.

It is an amenable number.

220405513 is a deficient number, since it is larger than the sum of its proper divisors (8751479).

220405513 is an frugal number, since it uses more digits than its factorization.

220405513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220405513 is about 14846.0605212292. The cubic root of 220405513 is about 604.0517559044.

Adding to 220405513 its reverse (315504022), we get a palindrome (535909535).

The spelling of 220405513 in words is "two hundred twenty million, four hundred five thousand, five hundred thirteen".