2143554515 has 16 divisors (see below), whose sum is σ = 2634508800. Its totient is φ = 1673421792.

The previous prime is 2143554493. The next prime is 2143554557. The reversal of 2143554515 is 5154553412.

It is a cyclic number.

It is not a de Polignac number, because 2143554515 - 2⁶ = 2143554451 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, 266726 + ... + 274644.

It is an arithmetic number, because the mean of its divisors is an integer number (164656800).

Almost surely, 2^2143554515 is an apocalyptic number.

2143554515 is a deficient number, since it is larger than the sum of its proper divisors (490954285).

2143554515 is a wasteful number, since it uses less digits than its factorization.

2143554515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226.

The product of its digits is 60000, while the sum is 35.

The square root of 2143554515 is about 46298.5368559310. The cubic root of 2143554515 is about 1289.3718302499.

The spelling of 2143554515 in words is "two billion, one hundred forty-three million, five hundred fifty-four thousand, five hundred fifteen".