220503685 has 8 divisors (see below), whose sum is σ = 280169496. Its totient is φ = 166026240.

The previous prime is 220503667. The next prime is 220503697. The reversal of 220503685 is 586305022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12047841 + 208455844 = 3471^2 + 14438^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220503685 - 2¹³ = 220495493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1296996 + ... + 1297165.

It is an arithmetic number, because the mean of its divisors is an integer number (35021187).

Almost surely, 2^220503685 is an apocalyptic number.

It is an amenable number.

220503685 is a deficient number, since it is larger than the sum of its proper divisors (59665811).

220503685 is a wasteful number, since it uses less digits than its factorization.

220503685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594183.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 220503685 is about 14849.3664848033. The cubic root of 220503685 is about 604.1414272347.

The spelling of 220503685 in words is "two hundred twenty million, five hundred three thousand, six hundred eighty-five".