2650822721 has 2 divisors, whose sum is σ = 2650822722. Its totient is φ = 2650822720.

The previous prime is 2650822663. The next prime is 2650822739. The reversal of 2650822721 is 1272280562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1662600625 + 988222096 = 40775^2 + 31436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650822721 - 2¹⁰ = 2650821697 is a prime.

It is a super-2 number, since 2×2650822721² = 14053722196339687682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2650822021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325411360 + 1325411361.

It is an arithmetic number, because the mean of its divisors is an integer number (1325411361).

Almost surely, 2^2650822721 is an apocalyptic number.

2650822721 is the 27521-st centered heptagonal number.

It is an amenable number.

2650822721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650822721 is an equidigital number, since it uses as much as digits as its factorization.

2650822721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 2650822721 is about 51486.1410575700. The cubic root of 2650822721 is about 1383.9706968706.

The spelling of 2650822721 in words is "two billion, six hundred fifty million, eight hundred twenty-two thousand, seven hundred twenty-one".