213256686 has 8 divisors (see below), whose sum is σ = 426513384. Its totient is φ = 71085560.

The previous prime is 213256669. The next prime is 213256699. The reversal of 213256686 is 686652312.

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

213256686 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17771385 + ... + 17771396.

It is an arithmetic number, because the mean of its divisors is an integer number (53314173).

Almost surely, 2^213256686 is an apocalyptic number.

213256686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213256686 is a wasteful number, since it uses less digits than its factorization.

213256686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35542786.

The product of its digits is 103680, while the sum is 39.

The square root of 213256686 is about 14603.3107889958. The cubic root of 213256686 is about 597.4490643601.

The spelling of 213256686 in words is "two hundred thirteen million, two hundred fifty-six thousand, six hundred eighty-six".