212682381 has 8 divisors (see below), whose sum is σ = 283768800. Its totient is φ = 141692112.

The previous prime is 212682377. The next prime is 212682391. The reversal of 212682381 is 183286212.

212682381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 212682381 - 2² = 212682377 is a prime.

It is a super-2 number, since 2×212682381² = 90467590375658322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212682341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18706 + ... + 27843.

It is an arithmetic number, because the mean of its divisors is an integer number (35471100).

Almost surely, 2^212682381 is an apocalyptic number.

212682381 is the 9224-th centered pentagonal number.

It is an amenable number.

212682381 is a deficient number, since it is larger than the sum of its proper divisors (71086419).

212682381 is a wasteful number, since it uses less digits than its factorization.

212682381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48075.

The product of its digits is 9216, while the sum is 33.

The square root of 212682381 is about 14583.6340121384. The cubic root of 212682381 is about 596.9122676620.

The spelling of 212682381 in words is "two hundred twelve million, six hundred eighty-two thousand, three hundred eighty-one".