212747381 has 8 divisors (see below), whose sum is σ = 265243584. Its totient is φ = 165777120.

The previous prime is 212747377. The next prime is 212747413. The reversal of 212747381 is 183747212.

212747381 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 a cyclic number.

It is not a de Polignac number, because 212747381 - 2² = 212747377 is a prime.

It is a super-2 number, since 2×212747381² = 90522896244718322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212741381) 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, 1381400 + ... + 1381553.

It is an arithmetic number, because the mean of its divisors is an integer number (33155448).

Almost surely, 2^212747381 is an apocalyptic number.

It is an amenable number.

212747381 is a deficient number, since it is larger than the sum of its proper divisors (52496203).

212747381 is a wasteful number, since it uses less digits than its factorization.

212747381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762971.

The product of its digits is 18816, while the sum is 35.

The square root of 212747381 is about 14585.8623673748. The cubic root of 212747381 is about 596.9730709206.

The spelling of 212747381 in words is "two hundred twelve million, seven hundred forty-seven thousand, three hundred eighty-one".