220869863 has 4 divisors (see below), whose sum is σ = 224613480. Its totient is φ = 217126248.

The previous prime is 220869791. The next prime is 220869877. The reversal of 220869863 is 368968022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368968022 = 2 ⋅184484011.

It is a cyclic number.

It is not a de Polignac number, because 220869863 - 2¹² = 220865767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220869263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871720 + ... + 1871837.

It is an arithmetic number, because the mean of its divisors is an integer number (56153370).

Almost surely, 2^220869863 is an apocalyptic number.

220869863 is a deficient number, since it is larger than the sum of its proper divisors (3743617).

220869863 is an equidigital number, since it uses as much as digits as its factorization.

220869863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743616.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 220869863 is about 14861.6911218071. The cubic root of 220869863 is about 604.4756634550.

The spelling of 220869863 in words is "two hundred twenty million, eight hundred sixty-nine thousand, eight hundred sixty-three".