212640195 has 8 divisors (see below), whose sum is σ = 340224336. Its totient is φ = 113408096.

The previous prime is 212640193. The next prime is 212640217. The reversal of 212640195 is 591046212.

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 212640195 - 2¹ = 212640193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212640193) 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, 7087992 + ... + 7088021.

It is an arithmetic number, because the mean of its divisors is an integer number (42528042).

Almost surely, 2^212640195 is an apocalyptic number.

212640195 is a deficient number, since it is larger than the sum of its proper divisors (127584141).

212640195 is a wasteful number, since it uses less digits than its factorization.

212640195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14176021.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 212640195 is about 14582.1875930877. The cubic root of 212640195 is about 596.8727987821.

The spelling of 212640195 in words is "two hundred twelve million, six hundred forty thousand, one hundred ninety-five".