215125112 has 8 divisors (see below), whose sum is σ = 403359600. Its totient is φ = 107562552.

The previous prime is 215125111. The next prime is 215125121. The reversal of 215125112 is 211521512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215125111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445312 + ... + 13445327.

It is an arithmetic number, because the mean of its divisors is an integer number (50419950).

Almost surely, 2^215125112 is an apocalyptic number.

It is an amenable number.

215125112 is a deficient number, since it is larger than the sum of its proper divisors (188234488).

215125112 is a wasteful number, since it uses less digits than its factorization.

215125112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26890645 (or 26890641 counting only the distinct ones).

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

The square root of 215125112 is about 14667.1439619307. The cubic root of 215125112 is about 599.1888223307.

Adding to 215125112 its reverse (211521512), we get a palindrome (426646624).

The spelling of 215125112 in words is "two hundred fifteen million, one hundred twenty-five thousand, one hundred twelve".