2011520345 has 8 divisors (see below), whose sum is σ = 2435186376. Its totient is φ = 1594974976.

The previous prime is 2011520339. The next prime is 2011520347. The reversal of 2011520345 is 5430251102.

It can be written as a sum of positive squares in 4 ways, for example, as 177241 + 2011343104 = 421^2 + 44848^2 .

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 2011520345 - 2⁸ = 2011520089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011520345.

It is not an unprimeable number, because it can be changed into a prime (2011520347) 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, 1779542 + ... + 1780671.

It is an arithmetic number, because the mean of its divisors is an integer number (304398297).

Almost surely, 2^2011520345 is an apocalyptic number.

It is an amenable number.

2011520345 is a deficient number, since it is larger than the sum of its proper divisors (423666031).

2011520345 is a wasteful number, since it uses less digits than its factorization.

2011520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560331.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2011520345 is about 44849.9759754674. The cubic root of 2011520345 is about 1262.3355407121.

Adding to 2011520345 its reverse (5430251102), we get a palindrome (7441771447).

The spelling of 2011520345 in words is "two billion, eleven million, five hundred twenty thousand, three hundred forty-five".