115221657206 has 4 divisors (see below), whose sum is σ = 172832485812. Its totient is φ = 57610828602.

The previous prime is 115221657169. The next prime is 115221657251. The reversal of 115221657206 is 602756122511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602756122511 = 250253 ⋅2408587.

It is a self number, because there is not a number n which added to its sum of digits gives 115221657206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28805414300 + ... + 28805414303.

It is an arithmetic number, because the mean of its divisors is an integer number (43208121453).

Almost surely, 2^115221657206 is an apocalyptic number.

115221657206 is a deficient number, since it is larger than the sum of its proper divisors (57610828606).

115221657206 is an equidigital number, since it uses as much as digits as its factorization.

115221657206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57610828605.

The product of its (nonzero) digits is 50400, while the sum is 38.

Adding to 115221657206 its reverse (602756122511), we get a palindrome (717977779717).

The spelling of 115221657206 in words is "one hundred fifteen billion, two hundred twenty-one million, six hundred fifty-seven thousand, two hundred six".