212744561 has 8 divisors (see below), whose sum is σ = 218715840. Its totient is φ = 206785008.

The previous prime is 212744527. The next prime is 212744573. The reversal of 212744561 is 165447212.

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

It is not a de Polignac number, because 212744561 - 2¹⁴ = 212728177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212744461) 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, 44300 + ... + 48866.

It is an arithmetic number, because the mean of its divisors is an integer number (27339480).

Almost surely, 2^212744561 is an apocalyptic number.

It is an amenable number.

212744561 is a deficient number, since it is larger than the sum of its proper divisors (5971279).

212744561 is a wasteful number, since it uses less digits than its factorization.

212744561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5863.

The product of its digits is 13440, while the sum is 32.

The square root of 212744561 is about 14585.7656981044. The cubic root of 212744561 is about 596.9704332516.

The spelling of 212744561 in words is "two hundred twelve million, seven hundred forty-four thousand, five hundred sixty-one".