2143478823 has 16 divisors (see below), whose sum is σ = 2886587616. Its totient is φ = 1414748160.

The previous prime is 2143478809. The next prime is 2143478837. The reversal of 2143478823 is 3288743412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2143478809) and next prime (2143478837).

It is not a de Polignac number, because 2143478823 - 2¹³ = 2143470631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143471823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116511 + ... + 133647.

It is an arithmetic number, because the mean of its divisors is an integer number (180411726).

Almost surely, 2^2143478823 is an apocalyptic number.

2143478823 is a deficient number, since it is larger than the sum of its proper divisors (743108793).

2143478823 is a wasteful number, since it uses less digits than its factorization.

2143478823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17554.

The product of its digits is 258048, while the sum is 42.

The square root of 2143478823 is about 46297.7194146753. The cubic root of 2143478823 is about 1289.3566535452.

The spelling of 2143478823 in words is "two billion, one hundred forty-three million, four hundred seventy-eight thousand, eight hundred twenty-three".