2143513513 has 4 divisors (see below), whose sum is σ = 2175506320. Its totient is φ = 2111520708.

The previous prime is 2143513499. The next prime is 2143513517. The reversal of 2143513513 is 3153153412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2143513513 - 2¹⁷ = 2143382441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143513517) 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, 15996303 + ... + 15996436.

It is an arithmetic number, because the mean of its divisors is an integer number (543876580).

Almost surely, 2^2143513513 is an apocalyptic number.

It is an amenable number.

2143513513 is a deficient number, since it is larger than the sum of its proper divisors (31992807).

2143513513 is an equidigital number, since it uses as much as digits as its factorization.

2143513513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31992806.

The product of its digits is 5400, while the sum is 28.

The square root of 2143513513 is about 46298.0940536433. The cubic root of 2143513513 is about 1289.3636091448.

Adding to 2143513513 its reverse (3153153412), we get a palindrome (5296666925).

The spelling of 2143513513 in words is "two billion, one hundred forty-three million, five hundred thirteen thousand, five hundred thirteen".