212852561 has 4 divisors (see below), whose sum is σ = 214028724. Its totient is φ = 211676400.

The previous prime is 212852543. The next prime is 212852569. The reversal of 212852561 is 165258212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17272336 + 195580225 = 4156^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 212852561 - 2¹⁴ = 212836177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212852569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587810 + ... + 588171.

It is an arithmetic number, because the mean of its divisors is an integer number (53507181).

Almost surely, 2^212852561 is an apocalyptic number.

It is an amenable number.

212852561 is a deficient number, since it is larger than the sum of its proper divisors (1176163).

212852561 is a wasteful number, since it uses less digits than its factorization.

212852561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176162.

The product of its digits is 9600, while the sum is 32.

The square root of 212852561 is about 14589.4674680058. The cubic root of 212852561 is about 597.0714337185.

It can be divided in two parts, 21 and 2852561, that added together give a palindrome (2852582).

The spelling of 212852561 in words is "two hundred twelve million, eight hundred fifty-two thousand, five hundred sixty-one".