221424233156 has 48 divisors (see below), whose sum is σ = 462163968000. Its totient is φ = 90758157600.

The previous prime is 221424233143. The next prime is 221424233183. The reversal of 221424233156 is 651332424122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6132845 + ... + 6168843.

It is an arithmetic number, because the mean of its divisors is an integer number (9628416000).

Almost surely, 2^221424233156 is an apocalyptic number.

It is an amenable number.

221424233156 is an abundant number, since it is smaller than the sum of its proper divisors (240739734844).

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

221424233156 is a wasteful number, since it uses less digits than its factorization.

221424233156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45584 (or 45582 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

Adding to 221424233156 its reverse (651332424122), we get a palindrome (872756657278).

The spelling of 221424233156 in words is "two hundred twenty-one billion, four hundred twenty-four million, two hundred thirty-three thousand, one hundred fifty-six".