102720223 has 4 divisors (see below), whose sum is σ = 103030888. Its totient is φ = 102409560.

The previous prime is 102720221. The next prime is 102720229. The reversal of 102720223 is 322027201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322027201 = 163 ⋅1975627.

It is a cyclic number.

It is not a de Polignac number, because 102720223 - 2¹ = 102720221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102720223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102720221) 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 3 ways as a sum of consecutive naturals, for example, 154836 + ... + 155497.

It is an arithmetic number, because the mean of its divisors is an integer number (25757722).

Almost surely, 2^102720223 is an apocalyptic number.

102720223 is a deficient number, since it is larger than the sum of its proper divisors (310665).

102720223 is an equidigital number, since it uses as much as digits as its factorization.

102720223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310664.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 102720223 is about 10135.0985688349. The cubic root of 102720223 is about 468.3300065478.

Adding to 102720223 its reverse (322027201), we get a palindrome (424747424).

It can be divided in two parts, 10272022 and 3, that added together give a square (10272025 = 3205²).

The spelling of 102720223 in words is "one hundred two million, seven hundred twenty thousand, two hundred twenty-three".