245198851 has 2 divisors, whose sum is σ = 245198852. Its totient is φ = 245198850.

The previous prime is 245198843. The next prime is 245198887. The reversal of 245198851 is 158891542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245198851 - 2³ = 245198843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245198798 and 245198807.

It is not a weakly prime, because it can be changed into another prime (245198651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122599425 + 122599426.

It is an arithmetic number, because the mean of its divisors is an integer number (122599426).

Almost surely, 2^245198851 is an apocalyptic number.

245198851 is a deficient number, since it is larger than the sum of its proper divisors (1).

245198851 is an equidigital number, since it uses as much as digits as its factorization.

245198851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 43.

The square root of 245198851 is about 15658.8266163209. The cubic root of 245198851 is about 625.9017179420.

The spelling of 245198851 in words is "two hundred forty-five million, one hundred ninety-eight thousand, eight hundred fifty-one".