223210545521 has 24 divisors (see below), whose sum is σ = 238744376640. Its totient is φ = 208288844192.

The previous prime is 223210545511. The next prime is 223210545541. The reversal of 223210545521 is 125545012322.

223210545521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 223210545521 - 2¹⁰ = 223210544497 is a prime.

It is a super-3 number, since 3×223210545521³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223210545511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16098890 + ... + 16112748.

It is an arithmetic number, because the mean of its divisors is an integer number (9947682360).

Almost surely, 2^223210545521 is an apocalyptic number.

It is an amenable number.

223210545521 is a deficient number, since it is larger than the sum of its proper divisors (15533831119).

223210545521 is a wasteful number, since it uses less digits than its factorization.

223210545521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14293 (or 14246 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 223210545521 its reverse (125545012322), we get a palindrome (348755557843).

The spelling of 223210545521 in words is "two hundred twenty-three billion, two hundred ten million, five hundred forty-five thousand, five hundred twenty-one".