115221995 has 32 divisors (see below), whose sum is σ = 161740800. Its totient is φ = 77172480.

The previous prime is 115221991. The next prime is 115222007. The reversal of 115221995 is 599122511.

It is not a de Polignac number, because 115221995 - 2² = 115221991 is a prime.

It is a super-2 number, since 2×115221995² = 26552216263560050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (115221991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494399 + ... + 494631.

It is an arithmetic number, because the mean of its divisors is an integer number (5054400).

Almost surely, 2^115221995 is an apocalyptic number.

115221995 is a deficient number, since it is larger than the sum of its proper divisors (46518805).

115221995 is a wasteful number, since it uses less digits than its factorization.

115221995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 8100, while the sum is 35.

The square root of 115221995 is about 10734.1508746617. The cubic root of 115221995 is about 486.6071248125.

The spelling of 115221995 in words is "one hundred fifteen million, two hundred twenty-one thousand, nine hundred ninety-five".