2143643515 has 16 divisors (see below), whose sum is σ = 2780568000. Its totient is φ = 1577100672.

The previous prime is 2143643501. The next prime is 2143643527. The reversal of 2143643515 is 5153463412.

It is a cyclic number.

It is not a de Polignac number, because 2143643515 - 2¹⁵ = 2143610747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43815 + ... + 78784.

It is an arithmetic number, because the mean of its divisors is an integer number (173785500).

Almost surely, 2^2143643515 is an apocalyptic number.

2143643515 is a deficient number, since it is larger than the sum of its proper divisors (636924485).

2143643515 is a wasteful number, since it uses less digits than its factorization.

2143643515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122886.

The product of its digits is 43200, while the sum is 34.

The square root of 2143643515 is about 46299.4979994384. The cubic root of 2143643515 is about 1289.3896748322.

The spelling of 2143643515 in words is "two billion, one hundred forty-three million, six hundred forty-three thousand, five hundred fifteen".