235400221 has 16 divisors (see below), whose sum is σ = 278841600. Its totient is φ = 194439168.

The previous prime is 235400203. The next prime is 235400237. The reversal of 235400221 is 122004532.

It is a de Polignac number, because none of the positive numbers 2^k-235400221 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 (235400261) 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, 166365 + ... + 167773.

It is an arithmetic number, because the mean of its divisors is an integer number (17427600).

Almost surely, 2^235400221 is an apocalyptic number.

It is an amenable number.

235400221 is a deficient number, since it is larger than the sum of its proper divisors (43441379).

235400221 is a wasteful number, since it uses less digits than its factorization.

235400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 235400221 is about 15342.7579333052. The cubic root of 235400221 is about 617.4507020258.

Adding to 235400221 its reverse (122004532), we get a palindrome (357404753).

The spelling of 235400221 in words is "two hundred thirty-five million, four hundred thousand, two hundred twenty-one".