2143513 has 6 divisors (see below), whose sum is σ = 2277326. Its totient is φ = 2017152.

The previous prime is 2143501. The next prime is 2143517. The reversal of 2143513 is 3153412.

It can be written as a sum of positive squares in 3 ways, for example, as 1227664 + 915849 = 1108^2 + 957^2 .

It is not a de Polignac number, because 2143513 - 2⁵ = 2143481 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 1 + 4⁴ + 3² + 5⁹ + 1 + 3¹⁰ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3420 + ... + 3997.

2^2143513 is an apocalyptic number.

It is an amenable number.

2143513 is a deficient number, since it is larger than the sum of its proper divisors (133813).

2143513 is an equidigital number, since it uses as much as digits as its factorization.

2143513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451 (or 7434 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 2143513 is about 1464.0741101461. The cubic root of 2143513 is about 128.9363506285.

Adding to 2143513 its reverse (3153412), we get a palindrome (5296925).

It can be divided in two parts, 21 and 43513, that added together give a palindrome (43534).

The spelling of 2143513 in words is "two million, one hundred forty-three thousand, five hundred thirteen".