212161441 has 8 divisors (see below), whose sum is σ = 222964544. Its totient is φ = 201625200.

The previous prime is 212161423. The next prime is 212161451. The reversal of 212161441 is 144161212.

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 212161441 - 2⁵ = 212161409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212161451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65085 + ... + 68266.

It is an arithmetic number, because the mean of its divisors is an integer number (27870568).

Almost surely, 2^212161441 is an apocalyptic number.

It is an amenable number.

212161441 is a deficient number, since it is larger than the sum of its proper divisors (10803103).

212161441 is a wasteful number, since it uses less digits than its factorization.

212161441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133431.

The product of its digits is 384, while the sum is 22.

The square root of 212161441 is about 14565.7626302230. The cubic root of 212161441 is about 596.4245141960.

The spelling of 212161441 in words is "two hundred twelve million, one hundred sixty-one thousand, four hundred forty-one".