2143000421 has 2 divisors, whose sum is σ = 2143000422. Its totient is φ = 2143000420.

The previous prime is 2143000403. The next prime is 2143000429. The reversal of 2143000421 is 1240003412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2088033025 + 54967396 = 45695^2 + 7414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143000421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2143000421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143000429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071500210 + 1071500211.

It is an arithmetic number, because the mean of its divisors is an integer number (1071500211).

Almost surely, 2^2143000421 is an apocalyptic number.

It is an amenable number.

2143000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143000421 is an equidigital number, since it uses as much as digits as its factorization.

2143000421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2143000421 is about 46292.5525435788. The cubic root of 2143000421 is about 1289.2607227790.

Adding to 2143000421 its reverse (1240003412), we get a palindrome (3383003833).

The spelling of 2143000421 in words is "two billion, one hundred forty-three million, four hundred twenty-one", and thus it is an aban number.