221430252052 has 96 divisors (see below), whose sum is σ = 409563786240. Its totient is φ = 104662471680.

The previous prime is 221430252023. The next prime is 221430252061. The reversal of 221430252052 is 250252034122.

It is a self number, because there is not a number n which added to its sum of digits gives 221430252052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153877149 + ... + 153878587.

It is an arithmetic number, because the mean of its divisors is an integer number (4266289440).

Almost surely, 2^221430252052 is an apocalyptic number.

It is an amenable number.

221430252052 is a deficient number, since it is larger than the sum of its proper divisors (188133534188).

221430252052 is a wasteful number, since it uses less digits than its factorization.

221430252052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1791 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 221430252052 its reverse (250252034122), we get a palindrome (471682286174).

The spelling of 221430252052 in words is "two hundred twenty-one billion, four hundred thirty million, two hundred fifty-two thousand, fifty-two".