220973311 has 4 divisors (see below), whose sum is σ = 237971272. Its totient is φ = 203975352.

The previous prime is 220973309. The next prime is 220973329. The reversal of 220973311 is 113379022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220973311 - 2¹ = 220973309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220973311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220973341) 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, 8498961 + ... + 8498986.

It is an arithmetic number, because the mean of its divisors is an integer number (59492818).

Almost surely, 2^220973311 is an apocalyptic number.

220973311 is a deficient number, since it is larger than the sum of its proper divisors (16997961).

220973311 is a wasteful number, since it uses less digits than its factorization.

220973311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16997960.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 220973311 is about 14865.1710720059. The cubic root of 220973311 is about 604.5700207348.

The spelling of 220973311 in words is "two hundred twenty million, nine hundred seventy-three thousand, three hundred eleven".