212428481 has 8 divisors (see below), whose sum is σ = 226105344. Its totient is φ = 198882880.

The previous prime is 212428477. The next prime is 212428511. The reversal of 212428481 is 184824212.

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 212428481 - 2² = 212428477 is a prime.

It is a super-2 number, since 2×212428481² = 90251719079934722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212428441) 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, 29465 + ... + 35958.

It is an arithmetic number, because the mean of its divisors is an integer number (28263168).

Almost surely, 2^212428481 is an apocalyptic number.

It is an amenable number.

212428481 is a deficient number, since it is larger than the sum of its proper divisors (13676863).

212428481 is a wasteful number, since it uses less digits than its factorization.

212428481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65631.

The product of its digits is 8192, while the sum is 32.

The square root of 212428481 is about 14574.9264492141. The cubic root of 212428481 is about 596.6746420013.

The spelling of 212428481 in words is "two hundred twelve million, four hundred twenty-eight thousand, four hundred eighty-one".