253316505 has 16 divisors (see below), whose sum is σ = 436484160. Its totient is φ = 124709568.

The previous prime is 253316489. The next prime is 253316509. The reversal of 253316505 is 505613352.

It is not a de Polignac number, because 253316505 - 2⁴ = 253316489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253316509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649335 + ... + 649724.

It is an arithmetic number, because the mean of its divisors is an integer number (27280260).

Almost surely, 2^253316505 is an apocalyptic number.

It is an amenable number.

253316505 is a deficient number, since it is larger than the sum of its proper divisors (183167655).

253316505 is a wasteful number, since it uses less digits than its factorization.

253316505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299080.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 253316505 is about 15915.9198603160. The cubic root of 253316505 is about 632.7339862414.

Adding to 253316505 its reverse (505613352), we get a palindrome (758929857).

The spelling of 253316505 in words is "two hundred fifty-three million, three hundred sixteen thousand, five hundred five".