253161565 has 8 divisors (see below), whose sum is σ = 304024320. Its totient is φ = 202375632.

The previous prime is 253161563. The next prime is 253161607. The reversal of 253161565 is 565161352.

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 253161565 - 2¹ = 253161563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253161565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253161563) 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, 11685 + ... + 25354.

It is an arithmetic number, because the mean of its divisors is an integer number (38003040).

Almost surely, 2^253161565 is an apocalyptic number.

It is an amenable number.

253161565 is a deficient number, since it is larger than the sum of its proper divisors (50862755).

253161565 is a wasteful number, since it uses less digits than its factorization.

253161565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38411.

The product of its digits is 27000, while the sum is 34.

The square root of 253161565 is about 15911.0516622881. The cubic root of 253161565 is about 632.6049568830.

The spelling of 253161565 in words is "two hundred fifty-three million, one hundred sixty-one thousand, five hundred sixty-five".