2534188981 has 2 divisors, whose sum is σ = 2534188982. Its totient is φ = 2534188980.

The previous prime is 2534188957. The next prime is 2534188991. The reversal of 2534188981 is 1898814352.

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., 2510511025 + 23677956 = 50105^2 + 4866^2 .

It is a cyclic number.

It is not a de Polignac number, because 2534188981 - 2¹¹ = 2534186933 is a prime.

It is a super-2 number, since 2×2534188981² = 12844227582843636722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2534188931) 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, 1267094490 + 1267094491.

It is an arithmetic number, because the mean of its divisors is an integer number (1267094491).

Almost surely, 2^2534188981 is an apocalyptic number.

It is an amenable number.

2534188981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2534188981 is an equidigital number, since it uses as much as digits as its factorization.

2534188981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 49.

The square root of 2534188981 is about 50340.7288485179. The cubic root of 2534188981 is about 1363.3676957176.

The spelling of 2534188981 in words is "two billion, five hundred thirty-four million, one hundred eighty-eight thousand, nine hundred eighty-one".