111620513 has 2 divisors, whose sum is σ = 111620514. Its totient is φ = 111620512.

The previous prime is 111620501. The next prime is 111620533. The reversal of 111620513 is 315026111.

It is an a-pointer prime, because the next prime (111620533) can be obtained adding 111620513 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 25928464 = 9257^2 + 5092^2 .

It is an emirp because it is prime and its reverse (315026111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111620513 - 2¹⁶ = 111554977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111620533) 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, 55810256 + 55810257.

It is an arithmetic number, because the mean of its divisors is an integer number (55810257).

Almost surely, 2^111620513 is an apocalyptic number.

It is an amenable number.

111620513 is a deficient number, since it is larger than the sum of its proper divisors (1).

111620513 is an equidigital number, since it uses as much as digits as its factorization.

111620513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 111620513 is about 10565.0609558109. The cubic root of 111620513 is about 481.4834215262.

Adding to 111620513 its reverse (315026111), we get a palindrome (426646624).

The spelling of 111620513 in words is "one hundred eleven million, six hundred twenty thousand, five hundred thirteen".