212854661 has 4 divisors (see below), whose sum is σ = 212937024. Its totient is φ = 212772300.

The previous prime is 212854651. The next prime is 212854669. The reversal of 212854661 is 166458212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212854661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212854669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37175 + ... + 42516.

It is an arithmetic number, because the mean of its divisors is an integer number (53234256).

Almost surely, 2^212854661 is an apocalyptic number.

It is an amenable number.

212854661 is a deficient number, since it is larger than the sum of its proper divisors (82363).

212854661 is an equidigital number, since it uses as much as digits as its factorization.

212854661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82362.

The product of its digits is 23040, while the sum is 35.

The square root of 212854661 is about 14589.5394375559. The cubic root of 212854661 is about 597.0733972778.

The spelling of 212854661 in words is "two hundred twelve million, eight hundred fifty-four thousand, six hundred sixty-one".