253218289 has 2 divisors, whose sum is σ = 253218290. Its totient is φ = 253218288.

The previous prime is 253218253. The next prime is 253218307. The reversal of 253218289 is 982812352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246741264 + 6477025 = 15708^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 253218289 - 2⁹ = 253217777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253218089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126609144 + 126609145.

It is an arithmetic number, because the mean of its divisors is an integer number (126609145).

Almost surely, 2^253218289 is an apocalyptic number.

It is an amenable number.

253218289 is a deficient number, since it is larger than the sum of its proper divisors (1).

253218289 is an equidigital number, since it uses as much as digits as its factorization.

253218289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 253218289 is about 15912.8340970426. The cubic root of 253218289 is about 632.6522010264.

The spelling of 253218289 in words is "two hundred fifty-three million, two hundred eighteen thousand, two hundred eighty-nine".