253243015 has 4 divisors (see below), whose sum is σ = 303891624. Its totient is φ = 202594408.

The previous prime is 253243009. The next prime is 253243021. The reversal of 253243015 is 510342352.

253243015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (253243009) and next prime (253243021).

It is a cyclic number.

It is not a de Polignac number, because 253243015 - 2²⁷ = 119025287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25324297 + ... + 25324306.

It is an arithmetic number, because the mean of its divisors is an integer number (75972906).

Almost surely, 2^253243015 is an apocalyptic number.

253243015 is a deficient number, since it is larger than the sum of its proper divisors (50648609).

253243015 is an equidigital number, since it uses as much as digits as its factorization.

253243015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50648608.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 253243015 is about 15913.6109981362. The cubic root of 253243015 is about 632.6727925474.

Adding to 253243015 its reverse (510342352), we get a palindrome (763585367).

The spelling of 253243015 in words is "two hundred fifty-three million, two hundred forty-three thousand, fifteen".