220561913 has 16 divisors (see below), whose sum is σ = 259691712. Its totient is φ = 184680000.

The previous prime is 220561897. The next prime is 220561967. The reversal of 220561913 is 319165022.

220561913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 220561913 - 2⁴ = 220561897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220560913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75938 + ... + 78788.

It is an arithmetic number, because the mean of its divisors is an integer number (16230732).

Almost surely, 2^220561913 is an apocalyptic number.

It is an amenable number.

220561913 is a deficient number, since it is larger than the sum of its proper divisors (39129799).

220561913 is a wasteful number, since it uses less digits than its factorization.

220561913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 220561913 is about 14851.3269777485. The cubic root of 220561913 is about 604.1946007240.

The spelling of 220561913 in words is "two hundred twenty million, five hundred sixty-one thousand, nine hundred thirteen".