115631101 has 2 divisors, whose sum is σ = 115631102. Its totient is φ = 115631100.

The previous prime is 115631099. The next prime is 115631123. The reversal of 115631101 is 101136511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112572100 + 3059001 = 10610^2 + 1749^2 .

It is a cyclic number.

It is not a de Polignac number, because 115631101 - 2¹ = 115631099 is a prime.

Together with 115631099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115631801) 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, 57815550 + 57815551.

It is an arithmetic number, because the mean of its divisors is an integer number (57815551).

Almost surely, 2^115631101 is an apocalyptic number.

It is an amenable number.

115631101 is a deficient number, since it is larger than the sum of its proper divisors (1).

115631101 is an equidigital number, since it uses as much as digits as its factorization.

115631101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 115631101 is about 10753.1902707987. The cubic root of 115631101 is about 487.1823585838.

Adding to 115631101 its reverse (101136511), we get a palindrome (216767612).

The spelling of 115631101 in words is "one hundred fifteen million, six hundred thirty-one thousand, one hundred one".