220208431 has 4 divisors (see below), whose sum is σ = 223495192. Its totient is φ = 216921672.

The previous prime is 220208419. The next prime is 220208453. The reversal of 220208431 is 134802022.

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 220208431 - 2⁵ = 220208399 is a prime.

It is a super-2 number, since 2×220208431² = 96983506166963522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220208491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643280 + ... + 1643413.

It is an arithmetic number, because the mean of its divisors is an integer number (55873798).

Almost surely, 2^220208431 is an apocalyptic number.

220208431 is a deficient number, since it is larger than the sum of its proper divisors (3286761).

220208431 is an equidigital number, since it uses as much as digits as its factorization.

220208431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286760.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 220208431 is about 14839.4215183746. The cubic root of 220208431 is about 603.8716587319.

The spelling of 220208431 in words is "two hundred twenty million, two hundred eight thousand, four hundred thirty-one".