102115081 has 2 divisors, whose sum is σ = 102115082. Its totient is φ = 102115080.

The previous prime is 102115043. The next prime is 102115087. The reversal of 102115081 is 180511201.

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., 86787856 + 15327225 = 9316^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 102115081 - 2¹⁵ = 102082313 is a prime.

It is a super-2 number, since 2×102115081² = 20854979535273122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102115087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51057540 + 51057541.

It is an arithmetic number, because the mean of its divisors is an integer number (51057541).

Almost surely, 2^102115081 is an apocalyptic number.

It is an amenable number.

102115081 is a deficient number, since it is larger than the sum of its proper divisors (1).

102115081 is an equidigital number, since it uses as much as digits as its factorization.

102115081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 102115081 is about 10105.2006907335. The cubic root of 102115081 is about 467.4085245255.

Adding to 102115081 its reverse (180511201), we get a palindrome (282626282).

The spelling of 102115081 in words is "one hundred two million, one hundred fifteen thousand, eighty-one".