253165109 has 2 divisors, whose sum is σ = 253165110. Its totient is φ = 253165108.

The previous prime is 253165093. The next prime is 253165111. The reversal of 253165109 is 901561352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147136900 + 106028209 = 12130^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 253165109 - 2⁴ = 253165093 is a prime.

Together with 253165111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253162109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126582554 + 126582555.

It is an arithmetic number, because the mean of its divisors is an integer number (126582555).

Almost surely, 2^253165109 is an apocalyptic number.

It is an amenable number.

253165109 is a deficient number, since it is larger than the sum of its proper divisors (1).

253165109 is an equidigital number, since it uses as much as digits as its factorization.

253165109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 253165109 is about 15911.1630310295. The cubic root of 253165109 is about 632.6079088075.

The spelling of 253165109 in words is "two hundred fifty-three million, one hundred sixty-five thousand, one hundred nine".