2145374513 has 4 divisors (see below), whose sum is σ = 2145468660. Its totient is φ = 2145280368.

The previous prime is 2145374507. The next prime is 2145374527. The reversal of 2145374513 is 3154735412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26337424 + 2119037089 = 5132^2 + 46033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145374513 - 2²⁶ = 2078265649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145374573) 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, 10943 + ... + 66411.

It is an arithmetic number, because the mean of its divisors is an integer number (536367165).

Almost surely, 2^2145374513 is an apocalyptic number.

It is an amenable number.

2145374513 is a deficient number, since it is larger than the sum of its proper divisors (94147).

2145374513 is an equidigital number, since it uses as much as digits as its factorization.

2145374513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94146.

The product of its digits is 50400, while the sum is 35.

The square root of 2145374513 is about 46318.1877128197. The cubic root of 2145374513 is about 1289.7366433523.

The spelling of 2145374513 in words is "two billion, one hundred forty-five million, three hundred seventy-four thousand, five hundred thirteen".