250505317 has 2 divisors, whose sum is σ = 250505318. Its totient is φ = 250505316.

The previous prime is 250505303. The next prime is 250505399. The reversal of 250505317 is 713505052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157402116 + 93103201 = 12546^2 + 9649^2 .

It is a cyclic number.

It is not a de Polignac number, because 250505317 - 2¹⁹ = 249981029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250505117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125252658 + 125252659.

It is an arithmetic number, because the mean of its divisors is an integer number (125252659).

Almost surely, 2^250505317 is an apocalyptic number.

It is an amenable number.

250505317 is a deficient number, since it is larger than the sum of its proper divisors (1).

250505317 is an equidigital number, since it uses as much as digits as its factorization.

250505317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 250505317 is about 15827.3597608698. The cubic root of 250505317 is about 630.3846789828.

The spelling of 250505317 in words is "two hundred fifty million, five hundred five thousand, three hundred seventeen".