212855461 has 48 divisors (see below), whose sum is σ = 287918400. Its totient is φ = 155457792.

The previous prime is 212855459. The next prime is 212855471. The reversal of 212855461 is 164558212.

It is a happy number.

It is not a de Polignac number, because 212855461 - 2¹ = 212855459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212855411) 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 47 ways as a sum of consecutive naturals, for example, 520225 + ... + 520633.

It is an arithmetic number, because the mean of its divisors is an integer number (5998300).

Almost surely, 2^212855461 is an apocalyptic number.

It is an amenable number.

212855461 is a deficient number, since it is larger than the sum of its proper divisors (75062939).

212855461 is a wasteful number, since it uses less digits than its factorization.

212855461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 491 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 212855461 is about 14589.5668544340. The cubic root of 212855461 is about 597.0741452970.

The spelling of 212855461 in words is "two hundred twelve million, eight hundred fifty-five thousand, four hundred sixty-one".