2530039981 has 36 divisors (see below), whose sum is σ = 3123338940. Its totient is φ = 2043135360.

The previous prime is 2530039979. The next prime is 2530039987. The reversal of 2530039981 is 1899300352.

It can be written as a sum of positive squares in 2 ways, for example, as 1891467081 + 638572900 = 43491^2 + 25270^2 .

It is not a de Polignac number, because 2530039981 - 2¹ = 2530039979 is a prime.

It is a super-2 number, since 2×2530039981² = 12802204610916960722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2530039987) 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 35 ways as a sum of consecutive naturals, for example, 4970355 + ... + 4970863.

It is an arithmetic number, because the mean of its divisors is an integer number (86759415).

Almost surely, 2^2530039981 is an apocalyptic number.

It is an amenable number.

2530039981 is a deficient number, since it is larger than the sum of its proper divisors (593298959).

2530039981 is a wasteful number, since it uses less digits than its factorization.

2530039981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 2530039981 is about 50299.5027907831. The cubic root of 2530039981 is about 1362.6232494741.

The spelling of 2530039981 in words is "two billion, five hundred thirty million, thirty-nine thousand, nine hundred eighty-one".