2143223251 has 4 divisors (see below), whose sum is σ = 2308086592. Its totient is φ = 1978359912.

The previous prime is 2143223233. The next prime is 2143223263. The reversal of 2143223251 is 1523223412.

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

It is a cyclic number.

It is not a de Polignac number, because 2143223251 - 2¹¹ = 2143221203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143223231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82431651 + ... + 82431676.

It is an arithmetic number, because the mean of its divisors is an integer number (577021648).

Almost surely, 2^2143223251 is an apocalyptic number.

2143223251 is a deficient number, since it is larger than the sum of its proper divisors (164863341).

2143223251 is a wasteful number, since it uses less digits than its factorization.

2143223251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164863340.

The product of its digits is 2880, while the sum is 25.

The square root of 2143223251 is about 46294.9592396408. The cubic root of 2143223251 is about 1289.3054071706.

Adding to 2143223251 its reverse (1523223412), we get a palindrome (3666446663).

The spelling of 2143223251 in words is "two billion, one hundred forty-three million, two hundred twenty-three thousand, two hundred fifty-one".