221511562132 has 24 divisors (see below), whose sum is σ = 462285000576. Its totient is φ = 90805981728.

The previous prime is 221511562099. The next prime is 221511562171. The reversal of 221511562132 is 231265115122.

221511562132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221511562094 and 221511562103.

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, 171980383 + ... + 171981670.

It is an arithmetic number, because the mean of its divisors is an integer number (19261875024).

Almost surely, 2^221511562132 is an apocalyptic number.

It is an amenable number.

221511562132 is an abundant number, since it is smaller than the sum of its proper divisors (240773438444).

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

221511562132 is a wasteful number, since it uses less digits than its factorization.

221511562132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343962087 (or 343962085 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

Adding to 221511562132 its reverse (231265115122), we get a palindrome (452776677254).

The spelling of 221511562132 in words is "two hundred twenty-one billion, five hundred eleven million, five hundred sixty-two thousand, one hundred thirty-two".