2720465281 has 2 divisors, whose sum is σ = 2720465282. Its totient is φ = 2720465280.

The previous prime is 2720465221. The next prime is 2720465287. The reversal of 2720465281 is 1825640272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2375100225 + 345365056 = 48735^2 + 18584^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720465281 - 2²¹ = 2718368129 is a prime.

It is a super-2 number, since 2×2720465281² = 14801862690252817922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2720465281.

It is not a weakly prime, because it can be changed into another prime (2720465287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360232640 + 1360232641.

It is an arithmetic number, because the mean of its divisors is an integer number (1360232641).

Almost surely, 2^2720465281 is an apocalyptic number.

It is an amenable number.

2720465281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720465281 is an equidigital number, since it uses as much as digits as its factorization.

2720465281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 2720465281 is about 52158.0797288397. The cubic root of 2720465281 is about 1395.9859990509.

The spelling of 2720465281 in words is "two billion, seven hundred twenty million, four hundred sixty-five thousand, two hundred eighty-one".