221030023 has 16 divisors (see below), whose sum is σ = 235717056. Its totient is φ = 206807040.

The previous prime is 221030009. The next prime is 221030053. The reversal of 221030023 is 320030122.

It is a happy number.

221030023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221030023 - 2²¹ = 218932871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221029985 and 221030012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030003) 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, 360265 + ... + 360877.

It is an arithmetic number, because the mean of its divisors is an integer number (14732316).

Almost surely, 2^221030023 is an apocalyptic number.

221030023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221030023 is a deficient number, since it is larger than the sum of its proper divisors (14687033).

221030023 is a wasteful number, since it uses less digits than its factorization.

221030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 221030023 is about 14867.0784957906. The cubic root of 221030023 is about 604.6217365463.

Adding to 221030023 its reverse (320030122), we get a palindrome (541060145).

Subtracting 221030023 from its reverse (320030122), we obtain a palindrome (99000099).

It can be divided in two parts, 2210300 and 23, that multiplied together give a square (50836900 = 7130²).

The spelling of 221030023 in words is "two hundred twenty-one million, thirty thousand, twenty-three".