220780423 has 4 divisors (see below), whose sum is σ = 221153328. Its totient is φ = 220407520.

The previous prime is 220780421. The next prime is 220780429. The reversal of 220780423 is 324087022.

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 220780423 - 2¹ = 220780421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220780391 and 220780400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220780421) 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, 185563 + ... + 186748.

It is an arithmetic number, because the mean of its divisors is an integer number (55288332).

Almost surely, 2^220780423 is an apocalyptic number.

220780423 is a deficient number, since it is larger than the sum of its proper divisors (372905).

220780423 is an equidigital number, since it uses as much as digits as its factorization.

220780423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372904.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 220780423 is about 14858.6817382970. The cubic root of 220780423 is about 604.3940594403.

The spelling of 220780423 in words is "two hundred twenty million, seven hundred eighty thousand, four hundred twenty-three".