220320623 has 4 divisors (see below), whose sum is σ = 221158608. Its totient is φ = 219482640.

The previous prime is 220320619. The next prime is 220320641. The reversal of 220320623 is 326023022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220320623 - 2² = 220320619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220320595 and 220320604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220320613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418598 + ... + 419123.

It is an arithmetic number, because the mean of its divisors is an integer number (55289652).

Almost surely, 2^220320623 is an apocalyptic number.

220320623 is a deficient number, since it is larger than the sum of its proper divisors (837985).

220320623 is an equidigital number, since it uses as much as digits as its factorization.

220320623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837984.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 220320623 is about 14843.2012382774. The cubic root of 220320623 is about 603.9741950220.

Adding to 220320623 its reverse (326023022), we get a palindrome (546343645).

The spelling of 220320623 in words is "two hundred twenty million, three hundred twenty thousand, six hundred twenty-three".