221444510252 has 48 divisors (see below), whose sum is σ = 444987648000. Its totient is φ = 94455528384.

The previous prime is 221444510219. The next prime is 221444510281. The reversal of 221444510252 is 252015444122.

221444510252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221444510252² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 13636874 + ... + 13653102.

It is an arithmetic number, because the mean of its divisors is an integer number (9270576000).

Almost surely, 2^221444510252 is an apocalyptic number.

It is an amenable number.

221444510252 is an abundant number, since it is smaller than the sum of its proper divisors (223543137748).

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

221444510252 is a wasteful number, since it uses less digits than its factorization.

221444510252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18518 (or 18516 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 221444510252 its reverse (252015444122), we get a palindrome (473459954374).

The spelling of 221444510252 in words is "two hundred twenty-one billion, four hundred forty-four million, five hundred ten thousand, two hundred fifty-two".