212478685 has 8 divisors (see below), whose sum is σ = 255110400. Its totient is φ = 169892304.

The previous prime is 212478661. The next prime is 212478697. The reversal of 212478685 is 586874212.

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 212478685 - 2¹⁹ = 211954397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 20614.

It is an arithmetic number, because the mean of its divisors is an integer number (31888800).

Almost surely, 2^212478685 is an apocalyptic number.

It is an amenable number.

212478685 is a deficient number, since it is larger than the sum of its proper divisors (42631715).

212478685 is a wasteful number, since it uses less digits than its factorization.

212478685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22667.

The product of its digits is 215040, while the sum is 43.

The square root of 212478685 is about 14576.6486203105. The cubic root of 212478685 is about 596.7216430657.

The spelling of 212478685 in words is "two hundred twelve million, four hundred seventy-eight thousand, six hundred eighty-five".