253535 has 4 divisors (see below), whose sum is σ = 304248. Its totient is φ = 202824.

The previous prime is 253531. The next prime is 253537. The reversal of 253535 is 535352.

It is a happy number.

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 253535 - 2² = 253531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253535.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253535.

It is not an unprimeable number, because it can be changed into a prime (253531) 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, 25349 + ... + 25358.

It is an arithmetic number, because the mean of its divisors is an integer number (76062).

2²⁵³⁵³⁵ is an apocalyptic number.

253535 is a deficient number, since it is larger than the sum of its proper divisors (50713).

253535 is an equidigital number, since it uses as much as digits as its factorization.

253535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50712.

The product of its digits is 2250, while the sum is 23.

The square root of 253535 is about 503.5225913502. The cubic root of 253535 is about 63.2915852905.

Adding to 253535 its reverse (535352), we get a palindrome (788887).

The spelling of 253535 in words is "two hundred fifty-three thousand, five hundred thirty-five".