2143454520 has 64 divisors (see below), whose sum is σ = 6808626720. Its totient is φ = 537964544.

The previous prime is 2143454501. The next prime is 2143454527. The reversal of 2143454520 is 254543412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143454527) 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, 523317 + ... + 527396.

Almost surely, 2^2143454520 is an apocalyptic number.

2143454520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143454520 is an abundant number, since it is smaller than the sum of its proper divisors (4665172200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143454520 is a wasteful number, since it uses less digits than its factorization.

2143454520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050744 (or 1050740 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2143454520 is about 46297.4569495993. The cubic root of 2143454520 is about 1289.3517805707.

Adding to 2143454520 its reverse (254543412), we get a palindrome (2397997932).

The spelling of 2143454520 in words is "two billion, one hundred forty-three million, four hundred fifty-four thousand, five hundred twenty".