216425223 has 16 divisors (see below), whose sum is σ = 366434560. Its totient is φ = 123671448.

The previous prime is 216425221. The next prime is 216425227. The reversal of 216425223 is 322524612.

It is a happy number.

216425223 is a `hidden beast` number, since 2 + 16 + 425 + 223 = 666.

216425223 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 216425223 - 2¹ = 216425221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216425221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572365 + ... + 572742.

It is an arithmetic number, because the mean of its divisors is an integer number (22902160).

Almost surely, 2^216425223 is an apocalyptic number.

216425223 is a deficient number, since it is larger than the sum of its proper divisors (150009337).

216425223 is a wasteful number, since it uses less digits than its factorization.

216425223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145123 (or 1145117 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 216425223 is about 14711.3977242137. The cubic root of 216425223 is about 600.3934669166.

Adding to 216425223 its reverse (322524612), we get a palindrome (538949835).

The spelling of 216425223 in words is "two hundred sixteen million, four hundred twenty-five thousand, two hundred twenty-three".