2520647881 has 2 divisors, whose sum is σ = 2520647882. Its totient is φ = 2520647880.

The previous prime is 2520647849. The next prime is 2520647971. The reversal of 2520647881 is 1887460252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2388765625 + 131882256 = 48875^2 + 11484^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520647881 - 2⁵ = 2520647849 is a prime.

It is a super-2 number, since 2×2520647881² = 12707331479979580322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2520647081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260323940 + 1260323941.

It is an arithmetic number, because the mean of its divisors is an integer number (1260323941).

Almost surely, 2^2520647881 is an apocalyptic number.

It is an amenable number.

2520647881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520647881 is an equidigital number, since it uses as much as digits as its factorization.

2520647881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 2520647881 is about 50206.0542265572. The cubic root of 2520647881 is about 1360.9350333568.

The spelling of 2520647881 in words is "two billion, five hundred twenty million, six hundred forty-seven thousand, eight hundred eighty-one".