2720465221 has 2 divisors, whose sum is σ = 2720465222. Its totient is φ = 2720465220.

The previous prime is 2720465213. The next prime is 2720465281. The reversal of 2720465221 is 1225640272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2715452100 + 5013121 = 52110^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720465221 - 2³ = 2720465213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2720465281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360232610 + 1360232611.

It is an arithmetic number, because the mean of its divisors is an integer number (1360232611).

Almost surely, 2^2720465221 is an apocalyptic number.

It is an amenable number.

2720465221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720465221 is an equidigital number, since it uses as much as digits as its factorization.

2720465221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 2720465221 is about 52158.0791536652. The cubic root of 2720465221 is about 1395.9859887880.

The spelling of 2720465221 in words is "two billion, seven hundred twenty million, four hundred sixty-five thousand, two hundred twenty-one".