221423423562 has 96 divisors (see below), whose sum is σ = 551131776000. Its totient is φ = 63540940320.

The previous prime is 221423423531. The next prime is 221423423609. The reversal of 221423423562 is 265324324122.

221423423562 is a `hidden beast` number, since 2 + 2 + 1 + 42 + 34 + 23 + 562 = 666.

221423423562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10594639 + ... + 10615517.

It is an arithmetic number, because the mean of its divisors is an integer number (5740956000).

Almost surely, 2^221423423562 is an apocalyptic number.

221423423562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221423423562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275565888000).

221423423562 is an abundant number, since it is smaller than the sum of its proper divisors (329708352438).

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

221423423562 is a wasteful number, since it uses less digits than its factorization.

221423423562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23736 (or 23733 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

Adding to 221423423562 its reverse (265324324122), we get a palindrome (486747747684).

The spelling of 221423423562 in words is "two hundred twenty-one billion, four hundred twenty-three million, four hundred twenty-three thousand, five hundred sixty-two".