2530906981 has 2 divisors, whose sum is σ = 2530906982. Its totient is φ = 2530906980.

The previous prime is 2530906979. The next prime is 2530906993. The reversal of 2530906981 is 1896090352.

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., 2486617956 + 44289025 = 49866^2 + 6655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2530906981 - 2¹ = 2530906979 is a prime.

It is a super-2 number, since 2×2530906981² = 12810980292949068722, which contains 22 as substring.

Together with 2530906979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2530906921) 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 as a sum of consecutive naturals, namely, 1265453490 + 1265453491.

It is an arithmetic number, because the mean of its divisors is an integer number (1265453491).

Almost surely, 2^2530906981 is an apocalyptic number.

It is an amenable number.

2530906981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2530906981 is an equidigital number, since it uses as much as digits as its factorization.

2530906981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 2530906981 is about 50308.1204280184. The cubic root of 2530906981 is about 1362.7788806689.

The spelling of 2530906981 in words is "two billion, five hundred thirty million, nine hundred six thousand, nine hundred eighty-one".