2520605881 has 4 divisors (see below), whose sum is σ = 2526003792. Its totient is φ = 2515207972.

The previous prime is 2520605849. The next prime is 2520605887. The reversal of 2520605881 is 1885060252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2520605881 - 2⁵ = 2520605849 is a prime.

It is a super-2 number, since 2×2520605881² = 12706908014663572322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2520605881.

It is not an unprimeable number, because it can be changed into a prime (2520605887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698255 + ... + 2699188.

It is an arithmetic number, because the mean of its divisors is an integer number (631500948).

Almost surely, 2^2520605881 is an apocalyptic number.

It is an amenable number.

2520605881 is a deficient number, since it is larger than the sum of its proper divisors (5397911).

2520605881 is an equidigital number, since it uses as much as digits as its factorization.

2520605881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5397910.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 2520605881 is about 50205.6359485666. The cubic root of 2520605881 is about 1360.9274745079.

The spelling of 2520605881 in words is "two billion, five hundred twenty million, six hundred five thousand, eight hundred eighty-one".