252780302909 has 2 divisors, whose sum is σ = 252780302910. Its totient is φ = 252780302908.

The previous prime is 252780302839. The next prime is 252780302917. The reversal of 252780302909 is 909203087252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192361188100 + 60419114809 = 438590^2 + 245803^2 .

It is a cyclic number.

It is not a de Polignac number, because 252780302909 - 2²⁰ = 252779254333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252780302969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126390151454 + 126390151455.

It is an arithmetic number, because the mean of its divisors is an integer number (126390151455).

Almost surely, 2^252780302909 is an apocalyptic number.

It is an amenable number.

252780302909 is a deficient number, since it is larger than the sum of its proper divisors (1).

252780302909 is an equidigital number, since it uses as much as digits as its factorization.

252780302909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 252780302909 in words is "two hundred fifty-two billion, seven hundred eighty million, three hundred two thousand, nine hundred nine".