232221153 has 4 divisors (see below), whose sum is σ = 309628208. Its totient is φ = 154814100.

The previous prime is 232221149. The next prime is 232221161. The reversal of 232221153 is 351122232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 232221153 - 2² = 232221149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232221193) 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 3 ways as a sum of consecutive naturals, for example, 38703523 + ... + 38703528.

It is an arithmetic number, because the mean of its divisors is an integer number (77407052).

Almost surely, 2^232221153 is an apocalyptic number.

It is an amenable number.

232221153 is a deficient number, since it is larger than the sum of its proper divisors (77407055).

232221153 is an equidigital number, since it uses as much as digits as its factorization.

232221153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77407054.

The product of its digits is 720, while the sum is 21.

The square root of 232221153 is about 15238.8041853684. The cubic root of 232221153 is about 614.6585479827.

Adding to 232221153 its reverse (351122232), we get a palindrome (583343385).

The spelling of 232221153 in words is "two hundred thirty-two million, two hundred twenty-one thousand, one hundred fifty-three".