111215145 has 16 divisors (see below), whose sum is σ = 184080960. Its totient is φ = 57269184.

The previous prime is 111215141. The next prime is 111215161. The reversal of 111215145 is 541512111.

It is not a de Polignac number, because 111215145 - 2² = 111215141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111215141) 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, 127399 + ... + 128268.

It is an arithmetic number, because the mean of its divisors is an integer number (11505060).

Almost surely, 2^111215145 is an apocalyptic number.

111215145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111215145 is a deficient number, since it is larger than the sum of its proper divisors (72865815).

111215145 is a wasteful number, since it uses less digits than its factorization.

111215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255704.

The product of its digits is 200, while the sum is 21.

The square root of 111215145 is about 10545.8591399658. The cubic root of 111215145 is about 480.8998527964.

Adding to 111215145 its reverse (541512111), we get a palindrome (652727256).

The spelling of 111215145 in words is "one hundred eleven million, two hundred fifteen thousand, one hundred forty-five".