2143551823 has 32 divisors (see below), whose sum is σ = 2669588480. Its totient is φ = 1681365600.

The previous prime is 2143551749. The next prime is 2143551827. The reversal of 2143551823 is 3281553412.

It is not a de Polignac number, because 2143551823 - 2¹³ = 2143543631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143551827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3961933 + ... + 3962473.

It is an arithmetic number, because the mean of its divisors is an integer number (83424640).

Almost surely, 2^2143551823 is an apocalyptic number.

2143551823 is a deficient number, since it is larger than the sum of its proper divisors (526036657).

2143551823 is an frugal number, since it uses more digits than its factorization.

2143551823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 598 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 2143551823 is about 46298.5077837288. The cubic root of 2143551823 is about 1289.3712904937.

The spelling of 2143551823 in words is "two billion, one hundred forty-three million, five hundred fifty-one thousand, eight hundred twenty-three".