221232045 has 16 divisors (see below), whose sum is σ = 354620160. Its totient is φ = 117774144.

The previous prime is 221232043. The next prime is 221232047. The reversal of 221232045 is 540232122.

It is an interprime number because it is at equal distance from previous prime (221232043) and next prime (221232047).

It is not a de Polignac number, because 221232045 - 2¹ = 221232043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232043) by changing a digit.

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, 4885 + ... + 21594.

It is an arithmetic number, because the mean of its divisors is an integer number (22163760).

Almost surely, 2^221232045 is an apocalyptic number.

It is an amenable number.

221232045 is a deficient number, since it is larger than the sum of its proper divisors (133388115).

221232045 is a wasteful number, since it uses less digits than its factorization.

221232045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27044.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 221232045 is about 14873.8712176756. The cubic root of 221232045 is about 604.8058890511.

Adding to 221232045 its reverse (540232122), we get a palindrome (761464167).

The spelling of 221232045 in words is "two hundred twenty-one million, two hundred thirty-two thousand, forty-five".