245051771 has 2 divisors, whose sum is σ = 245051772. Its totient is φ = 245051770.

The previous prime is 245051761. The next prime is 245051789. The reversal of 245051771 is 177150542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245051771 - 2¹⁴ = 245035387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245051761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122525885 + 122525886.

It is an arithmetic number, because the mean of its divisors is an integer number (122525886).

Almost surely, 2^245051771 is an apocalyptic number.

245051771 is a deficient number, since it is larger than the sum of its proper divisors (1).

245051771 is an equidigital number, since it uses as much as digits as its factorization.

245051771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 245051771 is about 15654.1295190758. The cubic root of 245051771 is about 625.7765460158.

The spelling of 245051771 in words is "two hundred forty-five million, fifty-one thousand, seven hundred seventy-one".