221532663132 has 36 divisors (see below), whose sum is σ = 610893102456. Its totient is φ = 67131109920.

The previous prime is 221532663113. The next prime is 221532663139. The reversal of 221532663132 is 231366235122.

221532663132 is a `hidden beast` number, since 2 + 2 + 1 + 532 + 66 + 31 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221532663139) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 279712563 + ... + 279713354.

It is an arithmetic number, because the mean of its divisors is an integer number (16969252846).

Almost surely, 2^221532663132 is an apocalyptic number.

221532663132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221532663132 is an abundant number, since it is smaller than the sum of its proper divisors (389360439324).

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

221532663132 is a wasteful number, since it uses less digits than its factorization.

221532663132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559425938 (or 559425933 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 221532663132 its reverse (231366235122), we get a palindrome (452898898254).

The spelling of 221532663132 in words is "two hundred twenty-one billion, five hundred thirty-two million, six hundred sixty-three thousand, one hundred thirty-two".