2145531013 has 8 divisors (see below), whose sum is σ = 2171151000. Its totient is φ = 2120060928.

The previous prime is 2145531007. The next prime is 2145531023. The reversal of 2145531013 is 3101355412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 239073444 + 1906457569 = 15462^2 + 43663^2 .

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 2145531013 - 2¹⁷ = 2145399941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145531023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8548 + ... + 66061.

It is an arithmetic number, because the mean of its divisors is an integer number (271393875).

Almost surely, 2^2145531013 is an apocalyptic number.

It is an amenable number.

2145531013 is a deficient number, since it is larger than the sum of its proper divisors (25619987).

2145531013 is a wasteful number, since it uses less digits than its factorization.

2145531013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74951.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2145531013 is about 46319.8770831702. The cubic root of 2145531013 is about 1289.7680036697.

Adding to 2145531013 its reverse (3101355412), we get a palindrome (5246886425).

The spelling of 2145531013 in words is "two billion, one hundred forty-five million, five hundred thirty-one thousand, thirteen".