2111312545 has 8 divisors (see below), whose sum is σ = 2536033896. Its totient is φ = 1687410816.

The previous prime is 2111312543. The next prime is 2111312563. The reversal of 2111312545 is 5452131112.

It can be written as a sum of positive squares in 4 ways, for example, as 338228881 + 1773083664 = 18391^2 + 42108^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111312545 - 2¹ = 2111312543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111312543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199222 + ... + 209551.

It is an arithmetic number, because the mean of its divisors is an integer number (317004237).

Almost surely, 2^2111312545 is an apocalyptic number.

It is an amenable number.

2111312545 is a deficient number, since it is larger than the sum of its proper divisors (424721351).

2111312545 is a wasteful number, since it uses less digits than its factorization.

2111312545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409811.

The product of its digits is 1200, while the sum is 25.

The square root of 2111312545 is about 45949.0211538831. The cubic root of 2111312545 is about 1282.8745101043.

Adding to 2111312545 its reverse (5452131112), we get a palindrome (7563443657).

The spelling of 2111312545 in words is "two billion, one hundred eleven million, three hundred twelve thousand, five hundred forty-five".