220961563 has 8 divisors (see below), whose sum is σ = 239401008. Its totient is φ = 203126784.

The previous prime is 220961561. The next prime is 220961567. The reversal of 220961563 is 365169022.

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

It is a cyclic number.

It is not a de Polignac number, because 220961563 - 2¹ = 220961561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220961561) 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, 150406 + ... + 151867.

It is an arithmetic number, because the mean of its divisors is an integer number (29925126).

Almost surely, 2^220961563 is an apocalyptic number.

220961563 is a deficient number, since it is larger than the sum of its proper divisors (18439445).

220961563 is a wasteful number, since it uses less digits than its factorization.

220961563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302333.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 220961563 is about 14864.7759148936. The cubic root of 220961563 is about 604.5593065986.

The spelling of 220961563 in words is "two hundred twenty million, nine hundred sixty-one thousand, five hundred sixty-three".