2321806651 has 2 divisors, whose sum is σ = 2321806652. Its totient is φ = 2321806650.

The previous prime is 2321806607. The next prime is 2321806657. The reversal of 2321806651 is 1566081232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2321806651 - 2¹¹ = 2321804603 is a prime.

It is a super-2 number, since 2×2321806651² = 10781572249255671602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2321806657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160903325 + 1160903326.

It is an arithmetic number, because the mean of its divisors is an integer number (1160903326).

Almost surely, 2^2321806651 is an apocalyptic number.

2321806651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321806651 is an equidigital number, since it uses as much as digits as its factorization.

2321806651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2321806651 is about 48185.1289403691. The cubic root of 2321806651 is about 1324.1647330421.

Adding to 2321806651 its reverse (1566081232), we get a palindrome (3887887883).

The spelling of 2321806651 in words is "two billion, three hundred twenty-one million, eight hundred six thousand, six hundred fifty-one".