2520537881 has 2 divisors, whose sum is σ = 2520537882. Its totient is φ = 2520537880.

The previous prime is 2520537829. The next prime is 2520537883. The reversal of 2520537881 is 1887350252.

2520537881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822521481 + 698016400 = 42691^2 + 26420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2520537881 is a prime.

It is a super-2 number, since 2×2520537881² = 12706222419111940322, which contains 22 as substring.

Together with 2520537883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2520537883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260268940 + 1260268941.

It is an arithmetic number, because the mean of its divisors is an integer number (1260268941).

Almost surely, 2^2520537881 is an apocalyptic number.

It is an amenable number.

2520537881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520537881 is an equidigital number, since it uses as much as digits as its factorization.

2520537881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 2520537881 is about 50204.9587291933. The cubic root of 2520537881 is about 1360.9152361937.

The spelling of 2520537881 in words is "two billion, five hundred twenty million, five hundred thirty-seven thousand, eight hundred eighty-one".