232221131 has 4 divisors (see below), whose sum is σ = 232262232. Its totient is φ = 232180032.

The previous prime is 232221107. The next prime is 232221149. The reversal of 232221131 is 131122232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232221131 is a prime.

It is a super-2 number, since 2×232221131² = 107853307365838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232221161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10406 + ... + 23931.

It is an arithmetic number, because the mean of its divisors is an integer number (58065558).

Almost surely, 2^232221131 is an apocalyptic number.

232221131 is a deficient number, since it is larger than the sum of its proper divisors (41101).

232221131 is an equidigital number, since it uses as much as digits as its factorization.

232221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41100.

The product of its digits is 144, while the sum is 17.

The square root of 232221131 is about 15238.8034635269. The cubic root of 232221131 is about 614.6585285723.

Adding to 232221131 its reverse (131122232), we get a palindrome (363343363).

The spelling of 232221131 in words is "two hundred thirty-two million, two hundred twenty-one thousand, one hundred thirty-one".