210505223 has 8 divisors (see below), whose sum is σ = 222937728. Its totient is φ = 198346104.

The previous prime is 210505213. The next prime is 210505277. The reversal of 210505223 is 322505012.

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

It is a cyclic number.

It is not a de Polignac number, because 210505223 - 2⁸ = 210504967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210505195 and 210505204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210505213) 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 7 ways as a sum of consecutive naturals, for example, 66761 + ... + 69842.

It is an arithmetic number, because the mean of its divisors is an integer number (27867216).

Almost surely, 2^210505223 is an apocalyptic number.

210505223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

210505223 is a deficient number, since it is larger than the sum of its proper divisors (12432505).

210505223 is a wasteful number, since it uses less digits than its factorization.

210505223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136693.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 210505223 is about 14508.7981238971. The cubic root of 210505223 is about 594.8684811588.

The spelling of 210505223 in words is "two hundred ten million, five hundred five thousand, two hundred twenty-three".