212381361 has 6 divisors (see below), whose sum is σ = 306773090. Its totient is φ = 141587568.

The previous prime is 212381359. The next prime is 212381381. The reversal of 212381361 is 163183212.

It is a happy number.

212381361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 211266225 + 1115136 = 14535^2 + 1056^2 .

It is not a de Polignac number, because 212381361 - 2¹ = 212381359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212381311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11798956 + ... + 11798973.

Almost surely, 2^212381361 is an apocalyptic number.

It is an amenable number.

212381361 is a deficient number, since it is larger than the sum of its proper divisors (94391729).

212381361 is a wasteful number, since it uses less digits than its factorization.

212381361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23597935 (or 23597932 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 212381361 is about 14573.3098848546. The cubic root of 212381361 is about 596.6305214451.

The spelling of 212381361 in words is "two hundred twelve million, three hundred eighty-one thousand, three hundred sixty-one".