221232361 has 16 divisors (see below), whose sum is σ = 262223104. Its totient is φ = 182689344.

The previous prime is 221232353. The next prime is 221232383. The reversal of 221232361 is 163232122.

It is a cyclic number.

It is not a de Polignac number, because 221232361 - 2³ = 221232353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221232061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22531 + ... + 30823.

It is an arithmetic number, because the mean of its divisors is an integer number (16388944).

Almost surely, 2^221232361 is an apocalyptic number.

It is an amenable number.

221232361 is a deficient number, since it is larger than the sum of its proper divisors (40990743).

221232361 is a wasteful number, since it uses less digits than its factorization.

221232361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440.

The product of its digits is 864, while the sum is 22.

The square root of 221232361 is about 14873.8818403267. The cubic root of 221232361 is about 604.8061770121.

Adding to 221232361 its reverse (163232122), we get a palindrome (384464483).

The spelling of 221232361 in words is "two hundred twenty-one million, two hundred thirty-two thousand, three hundred sixty-one".