2126243653 has 2 divisors, whose sum is σ = 2126243654. Its totient is φ = 2126243652.

The previous prime is 2126243627. The next prime is 2126243657. The reversal of 2126243653 is 3563426212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1554172929 + 572070724 = 39423^2 + 23918^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126243653 - 2¹⁷ = 2126112581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126243657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063121826 + 1063121827.

It is an arithmetic number, because the mean of its divisors is an integer number (1063121827).

Almost surely, 2^2126243653 is an apocalyptic number.

It is an amenable number.

2126243653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126243653 is an equidigital number, since it uses as much as digits as its factorization.

2126243653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 34.

The square root of 2126243653 is about 46111.2096241250. The cubic root of 2126243653 is about 1285.8915528534.

Adding to 2126243653 its reverse (3563426212), we get a palindrome (5689669865).

The spelling of 2126243653 in words is "two billion, one hundred twenty-six million, two hundred forty-three thousand, six hundred fifty-three".