220003431 has 4 divisors (see below), whose sum is σ = 293337912. Its totient is φ = 146668952.

The previous prime is 220003391. The next prime is 220003439. The reversal of 220003431 is 134300022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220003431 is a prime.

It is a super-2 number, since 2×220003431² = 96803019303543522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220003431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220003439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36667236 + ... + 36667241.

It is an arithmetic number, because the mean of its divisors is an integer number (73334478).

Almost surely, 2^220003431 is an apocalyptic number.

220003431 is a deficient number, since it is larger than the sum of its proper divisors (73334481).

220003431 is an equidigital number, since it uses as much as digits as its factorization.

220003431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73334480.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 220003431 is about 14832.5126327268. The cubic root of 220003431 is about 603.6842118904.

Adding to 220003431 its reverse (134300022), we get a palindrome (354303453).

The spelling of 220003431 in words is "two hundred twenty million, three thousand, four hundred thirty-one".