253240161 has 8 divisors (see below), whose sum is σ = 340231584. Its totient is φ = 167537760.

The previous prime is 253240157. The next prime is 253240171. The reversal of 253240161 is 161042352.

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

It is not a de Polignac number, because 253240161 - 2² = 253240157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253240171) 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, 321796 + ... + 322581.

It is an arithmetic number, because the mean of its divisors is an integer number (42528948).

Almost surely, 2^253240161 is an apocalyptic number.

It is an amenable number.

253240161 is a deficient number, since it is larger than the sum of its proper divisors (86991423).

253240161 is a wasteful number, since it uses less digits than its factorization.

253240161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644511.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 253240161 is about 15913.5213262182. The cubic root of 253240161 is about 632.6704158384.

The spelling of 253240161 in words is "two hundred fifty-three million, two hundred forty thousand, one hundred sixty-one".