215125312 has 14 divisors (see below), whose sum is σ = 426889418. Its totient is φ = 107562624.

The previous prime is 215125307. The next prime is 215125333. The reversal of 215125312 is 213521512.

It can be written as a sum of positive squares in only one way, i.e., 215032896 + 92416 = 14664^2 + 304^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680603 + ... + 1680730.

Almost surely, 2^215125312 is an apocalyptic number.

It is an amenable number.

215125312 is a deficient number, since it is larger than the sum of its proper divisors (211764106).

215125312 is an equidigital number, since it uses as much as digits as its factorization.

215125312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361345 (or 3361335 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 215125312 is about 14667.1507798891. The cubic root of 215125312 is about 599.1890080176.

Adding to 215125312 its reverse (213521512), we get a palindrome (428646824).

The spelling of 215125312 in words is "two hundred fifteen million, one hundred twenty-five thousand, three hundred twelve".