221323142240 has 48 divisors (see below), whose sum is σ = 528052951440. Its totient is φ = 87652723200.

The previous prime is 221323142207. The next prime is 221323142311. The reversal of 221323142240 is 42241323122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6831710 + ... + 6864029.

It is an arithmetic number, because the mean of its divisors is an integer number (11001103155).

Almost surely, 2^221323142240 is an apocalyptic number.

221323142240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221323142240 is an abundant number, since it is smaller than the sum of its proper divisors (306729809200).

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

221323142240 is a wasteful number, since it uses less digits than its factorization.

221323142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13695855 (or 13695847 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221323142240 its reverse (42241323122), we get a palindrome (263564465362).

The spelling of 221323142240 in words is "two hundred twenty-one billion, three hundred twenty-three million, one hundred forty-two thousand, two hundred forty".