220340403 has 6 divisors (see below), whose sum is σ = 318269484. Its totient is φ = 146893596.

The previous prime is 220340399. The next prime is 220340431. The reversal of 220340403 is 304043022.

220340403 is a `hidden beast` number, since 220 + 3 + 40 + 403 = 666.

It is not a de Polignac number, because 220340403 - 2² = 220340399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220340443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12241125 + ... + 12241142.

It is an arithmetic number, because the mean of its divisors is an integer number (53044914).

Almost surely, 2^220340403 is an apocalyptic number.

220340403 is a deficient number, since it is larger than the sum of its proper divisors (97929081).

220340403 is a wasteful number, since it uses less digits than its factorization.

220340403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24482273 (or 24482270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 220340403 is about 14843.8675216400. The cubic root of 220340403 is about 603.9922690632.

Adding to 220340403 its reverse (304043022), we get a palindrome (524383425).

The spelling of 220340403 in words is "two hundred twenty million, three hundred forty thousand, four hundred three".