223215616849 has 3 divisors (see below), whose sum is σ = 223216089307. Its totient is φ = 223215144392.

The previous prime is 223215616847. The next prime is 223215616861. The reversal of 223215616849 is 948616512322.

The square root of 223215616849 is 472457.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12747539025 + 210468077824 = 112905^2 + 458768^2 .

It is not a de Polignac number, because 223215616849 - 2¹ = 223215616847 is a prime.

It is a super-3 number, since 3×223215616849³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223215616843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 236229 + ... + 708685.

Almost surely, 2^223215616849 is an apocalyptic number.

223215616849 is the 472457-th square number.

223215616849 is the 236229-th centered octagonal number.

It is an amenable number.

223215616849 is a deficient number, since it is larger than the sum of its proper divisors (472458).

223215616849 is an frugal number, since it uses more digits than its factorization.

223215616849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944914 (or 472457 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

Multiplying 223215616849 by its sum of digits (49), we get a square (10937565225601 = 3307199²).

The spelling of 223215616849 in words is "two hundred twenty-three billion, two hundred fifteen million, six hundred sixteen thousand, eight hundred forty-nine".