220423455 has 24 divisors (see below), whose sum is σ = 436648992. Its totient is φ = 100764864.

The previous prime is 220423451. The next prime is 220423457. The reversal of 220423455 is 554324022.

It is a happy number.

220423455 is a `hidden beast` number, since 2 + 204 + 2 + 3 + 455 = 666.

It is not a de Polignac number, because 220423455 - 2² = 220423451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220423451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349564 + ... + 350193.

It is an arithmetic number, because the mean of its divisors is an integer number (18193708).

Almost surely, 2^220423455 is an apocalyptic number.

220423455 is a deficient number, since it is larger than the sum of its proper divisors (216225537).

220423455 is a wasteful number, since it uses less digits than its factorization.

220423455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699775 (or 699772 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 220423455 is about 14846.6647769794. The cubic root of 220423455 is about 604.0681463029.

Adding to 220423455 its reverse (554324022), we get a palindrome (774747477).

The spelling of 220423455 in words is "two hundred twenty million, four hundred twenty-three thousand, four hundred fifty-five".