223421401424 has 80 divisors (see below), whose sum is σ = 483332346000. Its totient is φ = 99338846208.

The previous prime is 223421401397. The next prime is 223421401447. The reversal of 223421401424 is 424104124322.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 41119728400 + 182301673024 = 202780^2 + 426968^2 .

It is a super-2 number, since 2×223421401424² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667122 + ... + 2749614.

It is an arithmetic number, because the mean of its divisors is an integer number (6041654325).

Almost surely, 2^223421401424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223421401424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241666173000).

223421401424 is an abundant number, since it is smaller than the sum of its proper divisors (259910944576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223421401424 is a wasteful number, since it uses less digits than its factorization.

223421401424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82992 (or 82986 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 223421401424 its reverse (424104124322), we get a palindrome (647525525746).

The spelling of 223421401424 in words is "two hundred twenty-three billion, four hundred twenty-one million, four hundred one thousand, four hundred twenty-four".