212140915 has 8 divisors (see below), whose sum is σ = 290936160. Its totient is φ = 145468032.

The previous prime is 212140913. The next prime is 212140921. The reversal of 212140915 is 519041212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212140915 - 2¹ = 212140913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212140915.

It is not an unprimeable number, because it can be changed into a prime (212140913) 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 in 7 ways as a sum of consecutive naturals, for example, 3030550 + ... + 3030619.

It is an arithmetic number, because the mean of its divisors is an integer number (36367020).

Almost surely, 2^212140915 is an apocalyptic number.

212140915 is a deficient number, since it is larger than the sum of its proper divisors (78795245).

212140915 is an equidigital number, since it uses as much as digits as its factorization.

212140915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061181.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 212140915 is about 14565.0580156757. The cubic root of 212140915 is about 596.4052794655.

The spelling of 212140915 in words is "two hundred twelve million, one hundred forty thousand, nine hundred fifteen".