2143605455 has 4 divisors (see below), whose sum is σ = 2572326552. Its totient is φ = 1714884360.

The previous prime is 2143605449. The next prime is 2143605461. The reversal of 2143605455 is 5545063412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2143605449) and next prime (2143605461).

It is not a de Polignac number, because 2143605455 - 2¹² = 2143601359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214360541 + ... + 214360550.

It is an arithmetic number, because the mean of its divisors is an integer number (643081638).

Almost surely, 2^2143605455 is an apocalyptic number.

2143605455 is a deficient number, since it is larger than the sum of its proper divisors (428721097).

2143605455 is an equidigital number, since it uses as much as digits as its factorization.

2143605455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428721096.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 2143605455 is about 46299.0869780388. The cubic root of 2143605455 is about 1289.3820438274.

Adding to 2143605455 its reverse (5545063412), we get a palindrome (7688668867).

The spelling of 2143605455 in words is "two billion, one hundred forty-three million, six hundred five thousand, four hundred fifty-five".