213686850 has 48 divisors (see below), whose sum is σ = 570713472. Its totient is φ = 52599360.

The previous prime is 213686827. The next prime is 213686861. The reversal of 213686850 is 58686312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213686799 and 213686808.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 52842 + ... + 56741.

It is an arithmetic number, because the mean of its divisors is an integer number (11889864).

Almost surely, 2^213686850 is an apocalyptic number.

213686850 is an abundant number, since it is smaller than the sum of its proper divisors (357026622).

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

213686850 is a wasteful number, since it uses less digits than its factorization.

213686850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109611 (or 109606 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 213686850 is about 14618.0316732452. The cubic root of 213686850 is about 597.8505030785.

The spelling of 213686850 in words is "two hundred thirteen million, six hundred eighty-six thousand, eight hundred fifty".