115152221 has 4 divisors (see below), whose sum is σ = 116292444. Its totient is φ = 114012000.

The previous prime is 115152211. The next prime is 115152239. The reversal of 115152221 is 122251511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122251511 = 101 ⋅1210411.

It can be written as a sum of positive squares in 2 ways, for example, as 110040100 + 5112121 = 10490^2 + 2261^2 .

It is a cyclic number.

It is not a de Polignac number, because 115152221 - 2⁶ = 115152157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115152193 and 115152202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115152211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569960 + ... + 570161.

It is an arithmetic number, because the mean of its divisors is an integer number (29073111).

Almost surely, 2^115152221 is an apocalyptic number.

It is an amenable number.

115152221 is a deficient number, since it is larger than the sum of its proper divisors (1140223).

115152221 is a wasteful number, since it uses less digits than its factorization.

115152221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140222.

The product of its digits is 200, while the sum is 20.

The square root of 115152221 is about 10730.9002884194. The cubic root of 115152221 is about 486.5088814714.

The spelling of 115152221 in words is "one hundred fifteen million, one hundred fifty-two thousand, two hundred twenty-one".