2152813 has 4 divisors (see below), whose sum is σ = 2318428. Its totient is φ = 1987200.

The previous prime is 2152811. The next prime is 2152817. The reversal of 2152813 is 3182512.

2152813 = 1037² + 1038².

2152813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1075369 + 1077444 = 1037^2 + 1038^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152813 - 2¹ = 2152811 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 (2152811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82788 + ... + 82813.

It is an arithmetic number, because the mean of its divisors is an integer number (579607).

2^2152813 is an apocalyptic number.

2152813 is the 1038-th centered square number.

It is an amenable number.

2152813 is a deficient number, since it is larger than the sum of its proper divisors (165615).

2152813 is a wasteful number, since it uses less digits than its factorization.

2152813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165614.

The product of its digits is 480, while the sum is 22.

The square root of 2152813 is about 1467.2467413493. The cubic root of 2152813 is about 129.1225524461.

The spelling of 2152813 in words is "two million, one hundred fifty-two thousand, eight hundred thirteen".