2499181481 has 2 divisors, whose sum is σ = 2499181482. Its totient is φ = 2499181480.

The previous prime is 2499181427. The next prime is 2499181483. The reversal of 2499181481 is 1841819942.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1601280256 + 897901225 = 40016^2 + 29965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2499181481 - 2³⁰ = 1425439657 is a prime.

It is a super-2 number, since 2×2499181481² = 12491816149946706722, which contains 22 as substring.

Together with 2499181483, 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 (2499181483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249590740 + 1249590741.

It is an arithmetic number, because the mean of its divisors is an integer number (1249590741).

Almost surely, 2^2499181481 is an apocalyptic number.

It is an amenable number.

2499181481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499181481 is an equidigital number, since it uses as much as digits as its factorization.

2499181481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 47.

The square root of 2499181481 is about 49991.8141399169. The cubic root of 2499181481 is about 1357.0606719697.

The spelling of 2499181481 in words is "two billion, four hundred ninety-nine million, one hundred eighty-one thousand, four hundred eighty-one".