3115518145 has 4 divisors (see below), whose sum is σ = 3738621780. Its totient is φ = 2492414512.

The previous prime is 3115518143. The next prime is 3115518151. The reversal of 3115518145 is 5418155113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1398161664 + 1717356481 = 37392^2 + 41441^2 .

It is a cyclic number.

It is not a de Polignac number, because 3115518145 - 2¹ = 3115518143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3115518145.

It is not an unprimeable number, because it can be changed into a prime (3115518143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311551810 + ... + 311551819.

It is an arithmetic number, because the mean of its divisors is an integer number (934655445).

Almost surely, 2^3115518145 is an apocalyptic number.

It is an amenable number.

3115518145 is a deficient number, since it is larger than the sum of its proper divisors (623103635).

3115518145 is an equidigital number, since it uses as much as digits as its factorization.

3115518145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623103634.

The product of its digits is 12000, while the sum is 34.

The square root of 3115518145 is about 55816.8267191893. The cubic root of 3115518145 is about 1460.5286984027.

The spelling of 3115518145 in words is "three billion, one hundred fifteen million, five hundred eighteen thousand, one hundred forty-five".