232021221 has 4 divisors (see below), whose sum is σ = 309361632. Its totient is φ = 154680812.

The previous prime is 232021213. The next prime is 232021241. The reversal of 232021221 is 122120232.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 232021221 - 2³ = 232021213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 232021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232021241) 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, 38670201 + ... + 38670206.

It is an arithmetic number, because the mean of its divisors is an integer number (77340408).

Almost surely, 2^232021221 is an apocalyptic number.

It is an amenable number.

232021221 is a deficient number, since it is larger than the sum of its proper divisors (77340411).

232021221 is an equidigital number, since it uses as much as digits as its factorization.

232021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77340410.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 232021221 is about 15232.2428092517. The cubic root of 232021221 is about 614.4820995187.

Adding to 232021221 its reverse (122120232), we get a palindrome (354141453).

The spelling of 232021221 in words is "two hundred thirty-two million, twenty-one thousand, two hundred twenty-one".