221423301144 has 48 divisors (see below), whose sum is σ = 601054225200. Its totient is φ = 73639629504.

The previous prime is 221423301137. The next prime is 221423301157. The reversal of 221423301144 is 441103324122.

221423301144 is a `hidden beast` number, since 2 + 214 + 2 + 3 + 301 + 144 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3471039 + ... + 3534254.

It is an arithmetic number, because the mean of its divisors is an integer number (12521963025).

Almost surely, 2^221423301144 is an apocalyptic number.

221423301144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221423301144 is an abundant number, since it is smaller than the sum of its proper divisors (379630924056).

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

221423301144 is a wasteful number, since it uses less digits than its factorization.

221423301144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005744 (or 7005737 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221423301144 its reverse (441103324122), we get a palindrome (662526625266).

The spelling of 221423301144 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred one thousand, one hundred forty-four".