253972171 has 2 divisors, whose sum is σ = 253972172. Its totient is φ = 253972170.

The previous prime is 253972157. The next prime is 253972177. The reversal of 253972171 is 171279352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253972171 - 2⁹ = 253971659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253972171.

It is not a weakly prime, because it can be changed into another prime (253972177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126986085 + 126986086.

It is an arithmetic number, because the mean of its divisors is an integer number (126986086).

Almost surely, 2^253972171 is an apocalyptic number.

253972171 is a deficient number, since it is larger than the sum of its proper divisors (1).

253972171 is an equidigital number, since it uses as much as digits as its factorization.

253972171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 253972171 is about 15936.5043532137. The cubic root of 253972171 is about 633.2794234507.

The spelling of 253972171 in words is "two hundred fifty-three million, nine hundred seventy-two thousand, one hundred seventy-one".