2143055550 has 24 divisors (see below), whose sum is σ = 5314778136. Its totient is φ = 571481440.

The previous prime is 2143055549. The next prime is 2143055557. The reversal of 2143055550 is 555503412.

It is a happy number.

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 (2143055557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7143369 + ... + 7143668.

It is an arithmetic number, because the mean of its divisors is an integer number (221449089).

Almost surely, 2^2143055550 is an apocalyptic number.

2143055550 is an abundant number, since it is smaller than the sum of its proper divisors (3171722586).

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

2143055550 is a wasteful number, since it uses less digits than its factorization.

2143055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287052 (or 14287047 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 2143055550 is about 46293.1479810998. The cubic root of 2143055550 is about 1289.2717781579.

Adding to 2143055550 its reverse (555503412), we get a palindrome (2698558962).

It can be divided in two parts, 21 and 43055550, that multiplied together give a triangular number (904166550 = T₄₂₅₂₄).

The spelling of 2143055550 in words is "two billion, one hundred forty-three million, fifty-five thousand, five hundred fifty".