2654816221 has 2 divisors, whose sum is σ = 2654816222. Its totient is φ = 2654816220.

The previous prime is 2654816191. The next prime is 2654816231. The reversal of 2654816221 is 1226184562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2513919321 + 140896900 = 50139^2 + 11870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2654816221 - 2⁵ = 2654816189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2654816231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327408110 + 1327408111.

It is an arithmetic number, because the mean of its divisors is an integer number (1327408111).

Almost surely, 2^2654816221 is an apocalyptic number.

It is an amenable number.

2654816221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2654816221 is an equidigital number, since it uses as much as digits as its factorization.

2654816221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 2654816221 is about 51524.9087432477. The cubic root of 2654816221 is about 1384.6653383004.

The spelling of 2654816221 in words is "two billion, six hundred fifty-four million, eight hundred sixteen thousand, two hundred twenty-one".