213626816 has 42 divisors (see below), whose sum is σ = 459056232. Its totient is φ = 98592000.

The previous prime is 213626779. The next prime is 213626837. The reversal of 213626816 is 618626312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 941 + ... + 20691.

Almost surely, 2^213626816 is an apocalyptic number.

213626816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213626816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229528116).

213626816 is an abundant number, since it is smaller than the sum of its proper divisors (245429416).

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

213626816 is a wasteful number, since it uses less digits than its factorization.

213626816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19789 (or 19766 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 213626816 is about 14615.9781061686. The cubic root of 213626816 is about 597.7945103664.

The spelling of 213626816 in words is "two hundred thirteen million, six hundred twenty-six thousand, eight hundred sixteen".