221223143004 has 24 divisors (see below), whose sum is σ = 543355088640. Its totient is φ = 69859939824.

The previous prime is 221223142967. The next prime is 221223143021. The reversal of 221223143004 is 400341322122.

It is a happy number.

221223143004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 485138244 + ... + 485138699.

It is an arithmetic number, because the mean of its divisors is an integer number (22639795360).

Almost surely, 2^221223143004 is an apocalyptic number.

It is an amenable number.

221223143004 is an abundant number, since it is smaller than the sum of its proper divisors (322131945636).

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

221223143004 is a wasteful number, since it uses less digits than its factorization.

221223143004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970276969 (or 970276967 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221223143004 its reverse (400341322122), we get a palindrome (621564465126).

The spelling of 221223143004 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-three thousand, four".