212891136 has 160 divisors (see below), whose sum is σ = 622245888. Its totient is φ = 64389120.

The previous prime is 212891101. The next prime is 212891179. The reversal of 212891136 is 631198212.

It is a junction number, because it is equal to n+sod(n) for n = 212891097 and 212891106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809341 + ... + 809603.

Almost surely, 2^212891136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212891136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311122944).

212891136 is an abundant number, since it is smaller than the sum of its proper divisors (409354752).

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

212891136 is a wasteful number, since it uses less digits than its factorization.

212891136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 316 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 212891136 is about 14590.7894234685. The cubic root of 212891136 is about 597.1075003730.

The spelling of 212891136 in words is "two hundred twelve million, eight hundred ninety-one thousand, one hundred thirty-six".