115213289 has 2 divisors, whose sum is σ = 115213290. Its totient is φ = 115213288.

The previous prime is 115213277. The next prime is 115213291. The reversal of 115213289 is 982312511.

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., 72114064 + 43099225 = 8492^2 + 6565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115213289 is a prime.

Together with 115213291, 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 (115212289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57606644 + 57606645.

It is an arithmetic number, because the mean of its divisors is an integer number (57606645).

Almost surely, 2^115213289 is an apocalyptic number.

It is an amenable number.

115213289 is a deficient number, since it is larger than the sum of its proper divisors (1).

115213289 is an equidigital number, since it uses as much as digits as its factorization.

115213289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 115213289 is about 10733.7453388833. The cubic root of 115213289 is about 486.5948687372.

It can be divided in two parts, 1152 and 13289, that added together give a palindrome (14441).

The spelling of 115213289 in words is "one hundred fifteen million, two hundred thirteen thousand, two hundred eighty-nine".