2155220223 has 16 divisors (see below), whose sum is σ = 3194505216. Its totient is φ = 1283505120.

The previous prime is 2155220201. The next prime is 2155220239. The reversal of 2155220223 is 3220225512.

2155220223 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 2155220223 - 2⁵ = 2155220191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2155220193 and 2155220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155220273) 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, 890115 + ... + 892532.

It is an arithmetic number, because the mean of its divisors is an integer number (199656576).

Almost surely, 2^2155220223 is an apocalyptic number.

2155220223 is a deficient number, since it is larger than the sum of its proper divisors (1039284993).

2155220223 is a wasteful number, since it uses less digits than its factorization.

2155220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782694.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2155220223 is about 46424.3494623242. The cubic root of 2155220223 is about 1291.7066174883.

Adding to 2155220223 its reverse (3220225512), we get a palindrome (5375445735).

The spelling of 2155220223 in words is "two billion, one hundred fifty-five million, two hundred twenty thousand, two hundred twenty-three".