253442505 has 8 divisors (see below), whose sum is σ = 405508032. Its totient is φ = 135169328.

The previous prime is 253442503. The next prime is 253442509. The reversal of 253442505 is 505244352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253442505 - 2¹ = 253442503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253442503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8448069 + ... + 8448098.

It is an arithmetic number, because the mean of its divisors is an integer number (50688504).

Almost surely, 2^253442505 is an apocalyptic number.

It is an amenable number.

253442505 is a deficient number, since it is larger than the sum of its proper divisors (152065527).

253442505 is a wasteful number, since it uses less digits than its factorization.

253442505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16896175.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 253442505 is about 15919.8776691280. The cubic root of 253442505 is about 632.8388764558.

Adding to 253442505 its reverse (505244352), we get a palindrome (758686857).

The spelling of 253442505 in words is "two hundred fifty-three million, four hundred forty-two thousand, five hundred five".