220542423 has 16 divisors (see below), whose sum is σ = 308739840. Its totient is φ = 139765824.

The previous prime is 220542409. The next prime is 220542431. The reversal of 220542423 is 324245022.

It is a happy number.

It is not a de Polignac number, because 220542423 - 2⁴ = 220542407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220542393 and 220542402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220542323) 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, 1443 + ... + 21051.

It is an arithmetic number, because the mean of its divisors is an integer number (19296240).

Almost surely, 2^220542423 is an apocalyptic number.

220542423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220542423 is a deficient number, since it is larger than the sum of its proper divisors (88197417).

220542423 is a wasteful number, since it uses less digits than its factorization.

220542423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19798.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 220542423 is about 14850.6707929305. The cubic root of 220542423 is about 604.1768036053.

Adding to 220542423 its reverse (324245022), we get a palindrome (544787445).

The spelling of 220542423 in words is "two hundred twenty million, five hundred forty-two thousand, four hundred twenty-three".