• 235^{2} = 55225 is the smallest square that contains exactly three digits '5'.

235 has 4 divisors (see below), whose sum is σ = 288. Its totient is φ = 184.

The previous prime is 233. The next prime is 239. The reversal of 235 is 532.

Subtracting from 235 its sum of digits (10), we obtain a square (225 = 15^{2}).

Adding to 235 its reverse (532), we get a palindrome (767).

It can be divided in two parts, 23 and 5, that added together give a triangular number (28 = T_{7}).

235 = T_{11} + T_{12} +
T_{13}.

235 is nontrivially palindromic in base 4, base 7, base 8 and base 13.

235 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 235 - 2^{1} = 233 is a prime.

It is a Duffinian number.

235 is an undulating number in base 7, base 8 and base 13.

235 is a lucky number.

It is a plaindrome in base 10, base 12 and base 14.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (233) 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, 19 + ... + 28.

It is an arithmetic number, because the mean of its divisors is an integer number (72).

235 is the 10-th heptagonal number.

235 is the 13-th centered triangular number.

235 is a deficient number, since it is larger than the sum of its proper divisors (53).

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

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

The sum of its prime factors is 52.

The product of its digits is 30, while the sum is 10.

The square root of 235 is about 15.3297097168. The cubic root of 235 is about 6.1710057928.

The spelling of 235 in words is "two hundred thirty-five", and thus it is an aban number.

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •