115252221 has 16 divisors (see below), whose sum is σ = 176265344. Its totient is φ = 65617344.

The previous prime is 115252217. The next prime is 115252237. The reversal of 115252221 is 122252511.

It is not a de Polignac number, because 115252221 - 2² = 115252217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115252121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4090 + ... + 15723.

It is an arithmetic number, because the mean of its divisors is an integer number (11016584).

Almost surely, 2^115252221 is an apocalyptic number.

It is an amenable number.

115252221 is a deficient number, since it is larger than the sum of its proper divisors (61013123).

115252221 is a wasteful number, since it uses less digits than its factorization.

115252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20100.

The product of its digits is 400, while the sum is 21.

The square root of 115252221 is about 10735.5587185763. The cubic root of 115252221 is about 486.6496713796.

The spelling of 115252221 in words is "one hundred fifteen million, two hundred fifty-two thousand, two hundred twenty-one".