2143055551 has 16 divisors (see below), whose sum is σ = 2674764288. Its totient is φ = 1671717600.

The previous prime is 2143055549. The next prime is 2143055557. The reversal of 2143055551 is 1555503412.

It is not a de Polignac number, because 2143055551 - 2¹ = 2143055549 is a prime.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159385 + ... + 172306.

It is an arithmetic number, because the mean of its divisors is an integer number (167172768).

Almost surely, 2^2143055551 is an apocalyptic number.

2143055551 is a deficient number, since it is larger than the sum of its proper divisors (531708737).

2143055551 is a wasteful number, since it uses less digits than its factorization.

2143055551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331782.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 2143055551 is about 46293.1479919005. The cubic root of 2143055551 is about 1289.2717783585.

Adding to 2143055551 its reverse (1555503412), we get a palindrome (3698558963).

The spelling of 2143055551 in words is "two billion, one hundred forty-three million, fifty-five thousand, five hundred fifty-one".