115400081 has 2 divisors, whose sum is σ = 115400082. Its totient is φ = 115400080.

The previous prime is 115400071. The next prime is 115400093. The reversal of 115400081 is 180004511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95863681 + 19536400 = 9791^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 115400081 - 2⁶ = 115400017 is a prime.

It is a super-2 number, since 2×115400081² = 26634357389613122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115400041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57700040 + 57700041.

It is an arithmetic number, because the mean of its divisors is an integer number (57700041).

Almost surely, 2^115400081 is an apocalyptic number.

It is an amenable number.

115400081 is a deficient number, since it is larger than the sum of its proper divisors (1).

115400081 is an equidigital number, since it uses as much as digits as its factorization.

115400081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 115400081 is about 10742.4429716894. The cubic root of 115400081 is about 486.8576941847.

Adding to 115400081 its reverse (180004511), we get a palindrome (295404592).

The spelling of 115400081 in words is "one hundred fifteen million, four hundred thousand, eighty-one".