220173439 has 4 divisors (see below), whose sum is σ = 227275840. Its totient is φ = 213071040.

The previous prime is 220173433. The next prime is 220173487. The reversal of 220173439 is 934371022.

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 220173439 - 2⁵ = 220173407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 7102369 = 220173439 / (2 + 2 + 0 + 1 + 7 + 3 + 4 + 3 + 9).

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 220173439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220173433) 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, 3551154 + ... + 3551215.

It is an arithmetic number, because the mean of its divisors is an integer number (56818960).

Almost surely, 2^220173439 is an apocalyptic number.

220173439 is a deficient number, since it is larger than the sum of its proper divisors (7102401).

220173439 is an equidigital number, since it uses as much as digits as its factorization.

220173439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102400.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 220173439 is about 14838.2424498321. The cubic root of 220173439 is about 603.8396711640.

The spelling of 220173439 in words is "two hundred twenty million, one hundred seventy-three thousand, four hundred thirty-nine".