245206111 has 2 divisors, whose sum is σ = 245206112. Its totient is φ = 245206110.

The previous prime is 245206109. The next prime is 245206123. The reversal of 245206111 is 111602542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245206111 - 2¹ = 245206109 is a prime.

Together with 245206109, it forms a pair of twin primes.

It is equal to p_13431316 and since 245206111 and 13431316 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245206411) 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, 122603055 + 122603056.

It is an arithmetic number, because the mean of its divisors is an integer number (122603056).

Almost surely, 2^245206111 is an apocalyptic number.

245206111 is a deficient number, since it is larger than the sum of its proper divisors (1).

245206111 is an equidigital number, since it uses as much as digits as its factorization.

245206111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 245206111 is about 15659.0584327411. The cubic root of 245206111 is about 625.9078952434.

Adding to 245206111 its reverse (111602542), we get a palindrome (356808653).

The spelling of 245206111 in words is "two hundred forty-five million, two hundred six thousand, one hundred eleven".