220203913 has 2 divisors, whose sum is σ = 220203914. Its totient is φ = 220203912.

The previous prime is 220203911. The next prime is 220203979. The reversal of 220203913 is 319302022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175085824 + 45118089 = 13232^2 + 6717^2 .

It is a cyclic number.

It is not a de Polignac number, because 220203913 - 2¹ = 220203911 is a prime.

Together with 220203911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220203911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110101956 + 110101957.

It is an arithmetic number, because the mean of its divisors is an integer number (110101957).

Almost surely, 2^220203913 is an apocalyptic number.

It is an amenable number.

220203913 is a deficient number, since it is larger than the sum of its proper divisors (1).

220203913 is an equidigital number, since it uses as much as digits as its factorization.

220203913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 220203913 is about 14839.2692879400. The cubic root of 220203913 is about 603.8675288403.

Adding to 220203913 its reverse (319302022), we get a palindrome (539505935).

The spelling of 220203913 in words is "two hundred twenty million, two hundred three thousand, nine hundred thirteen".