220803561 has 12 divisors (see below), whose sum is σ = 347933040. Its totient is φ = 133820280.

The previous prime is 220803553. The next prime is 220803563. The reversal of 220803561 is 165308022.

220803561 is a `hidden beast` number, since 2 + 20 + 80 + 3 + 561 = 666.

220803561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220803561 - 2³ = 220803553 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (220803563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115071 + ... + 1115268.

It is an arithmetic number, because the mean of its divisors is an integer number (28994420).

Almost surely, 2^220803561 is an apocalyptic number.

It is an amenable number.

220803561 is a deficient number, since it is larger than the sum of its proper divisors (127129479).

220803561 is a wasteful number, since it uses less digits than its factorization.

220803561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230356 (or 2230353 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 220803561 is about 14859.4603199443. The cubic root of 220803561 is about 604.4151723950.

The spelling of 220803561 in words is "two hundred twenty million, eight hundred three thousand, five hundred sixty-one".