115047221 has 8 divisors (see below), whose sum is σ = 116861400. Its totient is φ = 113247232.

The previous prime is 115047217. The next prime is 115047239. The reversal of 115047221 is 122740511.

It can be written as a sum of positive squares in 4 ways, for example, as 14546596 + 100500625 = 3814^2 + 10025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115047221 - 2² = 115047217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115041221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13421 + ... + 20253.

It is an arithmetic number, because the mean of its divisors is an integer number (14607675).

Almost surely, 2^115047221 is an apocalyptic number.

It is an amenable number.

115047221 is a deficient number, since it is larger than the sum of its proper divisors (1814179).

115047221 is a wasteful number, since it uses less digits than its factorization.

115047221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 115047221 is about 10726.0067592744. The cubic root of 115047221 is about 486.3609643157.

Adding to 115047221 its reverse (122740511), we get a palindrome (237787732).

The spelling of 115047221 in words is "one hundred fifteen million, forty-seven thousand, two hundred twenty-one".