253415 has 4 divisors (see below), whose sum is σ = 304104. Its totient is φ = 202728.

The previous prime is 253387. The next prime is 253417. The reversal of 253415 is 514352.

253415 = 77² + 78² + ... + 106².

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 253415 - 2⁸ = 253159 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 (253417) 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, 25337 + ... + 25346.

It is an arithmetic number, because the mean of its divisors is an integer number (76026).

2²⁵³⁴¹⁵ is an apocalyptic number.

253415 is a deficient number, since it is larger than the sum of its proper divisors (50689).

253415 is an equidigital number, since it uses as much as digits as its factorization.

253415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50688.

The product of its digits is 600, while the sum is 20.

The square root of 253415 is about 503.4034167544. The cubic root of 253415 is about 63.2815982555.

Adding to 253415 its reverse (514352), we get a palindrome (767767).

The spelling of 253415 in words is "two hundred fifty-three thousand, four hundred fifteen".