212686047 has 16 divisors (see below), whose sum is σ = 360103680. Its totient is φ = 121534776.

The previous prime is 212686043. The next prime is 212686079. The reversal of 212686047 is 740686212.

212686047 is a `hidden beast` number, since 21 + 26 + 8 + 604 + 7 = 666.

It is not a de Polignac number, because 212686047 - 2² = 212686043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212686043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562473 + ... + 562850.

It is an arithmetic number, because the mean of its divisors is an integer number (22506480).

Almost surely, 2^212686047 is an apocalyptic number.

212686047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

212686047 is a deficient number, since it is larger than the sum of its proper divisors (147417633).

212686047 is a wasteful number, since it uses less digits than its factorization.

212686047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125339 (or 1125333 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 212686047 is about 14583.7597004339. The cubic root of 212686047 is about 596.9156972954.

The spelling of 212686047 in words is "two hundred twelve million, six hundred eighty-six thousand, forty-seven".