245131111 has 2 divisors, whose sum is σ = 245131112. Its totient is φ = 245131110.

The previous prime is 245131099. The next prime is 245131127. The reversal of 245131111 is 111131542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245131111 - 2²³ = 236742503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245131151) 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, 122565555 + 122565556.

It is an arithmetic number, because the mean of its divisors is an integer number (122565556).

Almost surely, 2^245131111 is an apocalyptic number.

245131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

245131111 is an equidigital number, since it uses as much as digits as its factorization.

245131111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 245131111 is about 15656.6634695902. The cubic root of 245131111 is about 625.8440742686.

Adding to 245131111 its reverse (111131542), we get a palindrome (356262653).

The spelling of 245131111 in words is "two hundred forty-five million, one hundred thirty-one thousand, one hundred eleven".