221045132 has 24 divisors (see below), whose sum is σ = 482280960. Its totient is φ = 86121360.

The previous prime is 221045119. The next prime is 221045137. The reversal of 221045132 is 231540122.

It is not an unprimeable number, because it can be changed into a prime (221045137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358532 + ... + 359147.

It is an arithmetic number, because the mean of its divisors is an integer number (20095040).

Almost surely, 2^221045132 is an apocalyptic number.

221045132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221045132 is an abundant number, since it is smaller than the sum of its proper divisors (261235828).

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

221045132 is a wasteful number, since it uses less digits than its factorization.

221045132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717701 (or 717699 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 221045132 is about 14867.5866232553. The cubic root of 221045132 is about 604.6355129880.

Adding to 221045132 its reverse (231540122), we get a palindrome (452585254).

The spelling of 221045132 in words is "two hundred twenty-one million, forty-five thousand, one hundred thirty-two".