221320023 has 8 divisors (see below), whose sum is σ = 296216448. Its totient is φ = 146985144.

The previous prime is 221319983. The next prime is 221320049. The reversal of 221320023 is 320023122.

221320023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221320023 - 2⁸ = 221319767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221319984 and 221320011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139465 + ... + 141042.

It is an arithmetic number, because the mean of its divisors is an integer number (37027056).

Almost surely, 2^221320023 is an apocalyptic number.

221320023 is a deficient number, since it is larger than the sum of its proper divisors (74896425).

221320023 is a wasteful number, since it uses less digits than its factorization.

221320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280773.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 221320023 is about 14876.8283918314. The cubic root of 221320023 is about 604.8860500735.

Adding to 221320023 its reverse (320023122), we get a palindrome (541343145).

The spelling of 221320023 in words is "two hundred twenty-one million, three hundred twenty thousand, twenty-three".