2143610621 has 2 divisors, whose sum is σ = 2143610622. Its totient is φ = 2143610620.

The previous prime is 2143610611. The next prime is 2143610633. The reversal of 2143610621 is 1260163412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2114988121 + 28622500 = 45989^2 + 5350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143610621 - 2¹⁰ = 2143609597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143610611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071805310 + 1071805311.

It is an arithmetic number, because the mean of its divisors is an integer number (1071805311).

Almost surely, 2^2143610621 is an apocalyptic number.

It is an amenable number.

2143610621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143610621 is an equidigital number, since it uses as much as digits as its factorization.

2143610621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2143610621 is about 46299.1427674422. The cubic root of 2143610621 is about 1289.3830796123.

The spelling of 2143610621 in words is "two billion, one hundred forty-three million, six hundred ten thousand, six hundred twenty-one".