235440221 has 4 divisors (see below), whose sum is σ = 235560000. Its totient is φ = 235320444.

The previous prime is 235440217. The next prime is 235440239. The reversal of 235440221 is 122044532.

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 235440221 - 2² = 235440217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235440281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56891 + ... + 60888.

It is an arithmetic number, because the mean of its divisors is an integer number (58890000).

Almost surely, 2^235440221 is an apocalyptic number.

It is an amenable number.

235440221 is a deficient number, since it is larger than the sum of its proper divisors (119779).

235440221 is a wasteful number, since it uses less digits than its factorization.

235440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119778.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 235440221 is about 15344.0614245382. The cubic root of 235440221 is about 617.4856731475.

Adding to 235440221 its reverse (122044532), we get a palindrome (357484753).

The spelling of 235440221 in words is "two hundred thirty-five million, four hundred forty thousand, two hundred twenty-one".