212857241 has 2 divisors, whose sum is σ = 212857242. Its totient is φ = 212857240.

The previous prime is 212857231. The next prime is 212857259. The reversal of 212857241 is 142758212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181171600 + 31685641 = 13460^2 + 5629^2 .

It is a cyclic number.

It is not a de Polignac number, because 212857241 - 2¹⁴ = 212840857 is a prime.

It is a super-2 number, since 2×212857241² = 90616410092264162, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212857198 and 212857207.

It is not a weakly prime, because it can be changed into another prime (212857231) 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 as a sum of consecutive naturals, namely, 106428620 + 106428621.

It is an arithmetic number, because the mean of its divisors is an integer number (106428621).

Almost surely, 2^212857241 is an apocalyptic number.

It is an amenable number.

212857241 is a deficient number, since it is larger than the sum of its proper divisors (1).

212857241 is an equidigital number, since it uses as much as digits as its factorization.

212857241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 32.

The square root of 212857241 is about 14589.6278568029. The cubic root of 212857241 is about 597.0758096330.

The spelling of 212857241 in words is "two hundred twelve million, eight hundred fifty-seven thousand, two hundred forty-one".