2143856469 has 16 divisors (see below), whose sum is σ = 3012807680. Its totient is φ = 1352265840.

The previous prime is 2143856459. The next prime is 2143856483. The reversal of 2143856469 is 9646583412.

It is not a de Polignac number, because 2143856469 - 2⁵ = 2143856437 is a prime.

It is a super-2 number, since 2×2143856469² = 9192241119346295922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143856459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20964 + ... + 68754.

It is an arithmetic number, because the mean of its divisors is an integer number (188300480).

Almost surely, 2^2143856469 is an apocalyptic number.

It is an amenable number.

2143856469 is a deficient number, since it is larger than the sum of its proper divisors (868951211).

2143856469 is a wasteful number, since it uses less digits than its factorization.

2143856469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48600.

The product of its digits is 1244160, while the sum is 48.

The square root of 2143856469 is about 46301.7976864830. The cubic root of 2143856469 is about 1289.4323703014.

The spelling of 2143856469 in words is "two billion, one hundred forty-three million, eight hundred fifty-six thousand, four hundred sixty-nine".